Structural Timber - Spring Issue 2019 by Radar Communications

SPRING 2019 | Â£4.95

STRUCTURAL TIMBER The latest in structural timber building design and technologies STRUCTURALTIMBERMAGAZINE.CO.UK

SOLID WOOD SOLUTIONS

UNDERSTANDING THE IMPACT OF ENGINEERED TIMBER ACROSS THE BUILT ENVIRONMENT.

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Transformational Construction

Alex de Rijke talks timber and the future of contemporary building design.

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Material Mix

Charterhouse School demonstrates how hybrid construction can overcome complex design and engineering challenges.

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Combustibles Legislation

Understanding the protocols surrounding new Building Regulations, CLT and multi-storey buildings.

DESIGN

TECHNOLOGY

SUSTAINABILITY

INTERVIEWS

NEWS

ANALYSIS

CASE STUDIES

Futureproof The Evolution of CLT COMPLIANT INNOVATIVE COST EFFECTIVE With B&K Structures, the restriction on combustible materials does not mean an end to building with CLT. We achieve highly practical, sustainable structures over 18m. • Meeting the Latest Building Regulations • Panelised Hybrid Approach Integrating a CLT Superstructure • Non-Combustible Unitised Wall Panel Systems • Structural Steel Carrier Frame & Non-Combustible SFS Infill Walling • Factory Fitted Added Value Options • No Impact on Cost or Programme • Delivers a Lower Carbon Footprint Compliant System

B&K Structures Limited Peveril House Alfreton Road Derby DE21 4AG 01773 853400 sales@bkstructures.co.uk B&K Structures

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WELCOME Welcome to the new look Structural Timber Magazine. First published in autumn 2014, the magazine has developed over the last few years to reflect the growing interest in timber and offsite manufacture.

FOLLOW US ON TWITTER UNDER: twitter.com/STMagUK ADVERTISING ENQUIRIES PLEASE CONTACT: ANDREW TANSELL // T: 01743 290002 E: andrew.tansell@structuraltimbermagazine.co.uk BACK ISSUES VISIT: www.structuraltimbermagazine.co.uk SUBSCRIPTIONS VISIT: www.structuraltimbermagazine.co.uk FRONT COVER: Stephen Perse School Cambridge. Courtesy Philip Vile. PRINTED ON: PEFC 16-33-576 paper stock by Buxton Press

PEFC Certified This product is from sustainably managed forests and controlled sources PEFC/16-33-576

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©Radar Communications Ltd. RELATED EVENTS: www.structuraltimber.co.uk/events www.solidwoodsolutions.co.uk www.structuraltimberawards.co.uk www.offsite-expo.co.uk DISCLAIMER: The content of Structural Timber Magazine does not necessarily reflect the views of the editor or publishers and are the views of its contributors and advertisers. The digital edition may include hyperlinks to third-party content, advertising, or websites, provided for the sake of convenience and interest. The publishers accept no legal responsibility for loss arising from information in this publication and do not endorse any advertising or products available from external sources. No part of this publication may be reproduced or stored in a retrieval system without the written consent of the publishers. All rights reserved.

In the period since we first launched the rise of engineered timber has soared. Cross laminated timber (CLT) and glulam in particular have become almost commonplace options for many architects and structural engineers – a sustainable and natural product with an array of structural and environmental benefits. To understand how far things are progressing on the use of engineered timber, many will be attending Solid Wood Solutions 2019. Previewed this issue, the event will once again attest to the huge potential that engineered timber has and demonstrate the incredible range of buildings where it can deliver a striking architectural dimension, alongside a hefty dose of sequestered carbon. Not to mention the raft of benefits wrapped up in its precision factory production. There are many solid timber examples covered this issue, including the awardwinning new Cambridge mosque that is a masterpiece of timber construction and engineering. The use of timber complements the mosque’s sustainable construction concept, which incorporates features such as solar energy generation and rainwater harvesting. You can also read about the new Science and Mathematics Centre at Charterhouse School, that has used CLT,

glulam, steel frame and reinforced concrete to create an exemplar of hybrid construction – the shape of a truly contemporary approach to construction. Of course it is not all plain sailing for structural timber – especially at height. The fashion for ‘tall timber’ has become slightly frayed following the government’s decision to restrict the use of combustible materials in the external walls of new buildings over 18m tall. Expert comment from Jeremy English at Södra Wood and Andy Goodwin, Managing Director of B&K Structures, put things into perspective on what the impact of the legislation is and the longer-term implications for the construction sector. As a final pointer, in this issue we carry a piece from one the UK’s foremost and passionate advocates of CLT and timber. Alex de Rijke of dRMM has been central to the pioneering use of timber in the UK and needs very little introduction from me. Transformational timber is what it’s all about… Many thanks to all our contributors, advertisers and supporters.

Gary Ramsay | Consultant Editor E: gary.ramsay@structuraltimbermagazine.co.uk

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• Members of Structural Timber Association. • Extensive experience of applying STA guidance and research. • Determination of category of frame needed. Protecting people and property since 1982

FIRE ENGINEERING CONSULTANTS

• Advice on appropriate solutions to reduce the risk of fire spread to surrounding buildings. • Use of advanced computer modelling techniques to analyse timber frame proposals and provide a cost effective solution.

The multi-disciplinary team comprises both chartered and graduate engineers, with specialist experience in fire protection and fire engineering, and experienced fire safety professionals with backgrounds in local authority fire and rescue services. For further information visit our website:

www.cstodd.co.uk Tel: 01252 792088

Certificate Number 860 ISO 9001

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NEW 10,000 M2 CLT FACTORY

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for their HEXAPLI CLT panels with Use Class 2 durability performance combined with a water repellent treatment to significantly reduce water absorption on all surfaces.

DOUGLAS FIR AND PINE for superior mechanical strength and biological durability. Spruce also available.

For an HEXAPLI brochure, please contact : elisabeth.piveteau@piveteau.com +44 (0) 7821 807788 www.piveteaubois.com/en

2019 – Crédits photos : iStock. PIVETEAUBOIS. La Vallée – 85 140 Sainte-Florence. RCS 54725010072B10 –

CLT IS GOOD DURABLE CLT IS BETTER

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CONTENTS

THISISSUE... P6

P26 MAXIMISING TIMBER BENEFITS

COVER STORY - SOLID WOOD SOLUTIONS The seventh Solid Wood Solutions conference and exhibition will celebrate the use of cross laminated timber (CLT), laminated veneer lumber (LVL) and glulam as innovative and sustainable structural alternatives to steel and concrete. Attend to hear and learn more about timber technology fit for the 21st Century.

P30 LEARNING THE HYBRID WAY

A new building at Charterhouse School is an exemplar of hybrid construction, demonstrating how materials can work together to overcome complex design and engineering challenges.

P36 COMBATING THE CLIMATE

Robin Lancashire, Timber Frame Consultant at BM TRADA, considers the challenges and solutions when mixing building innovation with the unpredictable UK climate.

P38 THE WONDER OF TIMBER

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A new housing industrialisation project could be key to tackling the housing crisis. Stewart Dalgarno, AIMCH Project Director and Director of Product Development at Stewart Milne Group, outlines what this new development could achieve.

A quick round-up of some recent news stories from the timber and construction sectors that you may have missed including the Sevenoaks Modular £6.5million investment in regenerating the old Metal Box plant, CSIC and the STA join forces and the tallest timber building in the world confirmed.

THE FUTURE OF HOUSING DELIVERY

A new timber estimating guide has been developed by Rider Levett Bucknall to provide financial and technical information for construction industry professionals.

INDUSTRY NEWS

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TRANSFORMATIONAL TIMBER Professor Alex de Rijke, Founding Director, dRMM Architects – one of the UK’s leading architectural practices – have been at the forefront of timber construction for many years. Here, he outlines why engineered timber is so essential to contemporary building design and where the industry’s future may rest.

The stunning, award-winning new Cambridge Mosque, combines Islamic principles with European sensibilities. The structure is a masterpiece of 21st century timber construction and engineering.

P40 THE EVOLUTION OF CLT

Andy Goodwin, Managing Director, B&K Structures, explains how they have taken an innovative approach to embrace the protocols surrounding new UK Building Regulations and CLT.

P42 COMBUSTIBLES’ LEGISLATION: AN INFORMED POLICY FOR TIMBER CONSTRUCTION?

Jeremy English, Sales Director at Södra Wood, considers the impact of new legislation restricting the use of combustible materials in the external walls of new buildings over 18m tall.

P46 A CHANGE IN TIMBER HABITS One rapid growth area for the timber specifier are the options available in modified wood products – increasingly popular across a range of construction applications, cladding, decking and joinery.

P54 RETHINKING WOODEN WINDOWS

Tony Pell, Chairman of the Wood Window Alliance, outlines several reasons why natural materials are the best way forward for window design and installation.

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TECHNOLOGY

INNOVATION

COVER STORY SOLID WOOD SOLUTIONS 2019

TIMBER FIT FOR THE 21ST CENTURY

01 The seventh Solid Wood Solutions conference and exhibition will celebrate the use of cross laminated timber (CLT), laminated veneer lumber (LVL) and glulam as innovative and sustainable structural alternatives to steel and concrete.

Todayâ&#x20AC;&#x2122;s interest in engineered timber is driven by both technological advances and the growing concern for the environment and sustainable construction practices. As a construction material timber has gone from near ubiquity, to marginalisation, to a contemporary resurgence. The Solid Wood Solutions conference and exhibition will address timberâ&#x20AC;&#x2122;s use in the construction industry as a versatile, natural material that is undergoing a revival where it is used in

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widespread applications in high-quality architecture to the realisation of cutting edge structural engineering within contemporary building design. Designed to inspire through innovation, the conference will also provide a valuable networking opportunity where guests will be able to gain insights from industry leaders who are shaping the future of the construction industry.

COVER STORY SOLID WOOD SOLUTIONS 2019 Conference Programme The conference will begin with an introduction from Nick Milestone, Chairman of Trada. The international speaker line-up will include Andrew Goodwin, Managing Director of B&K Structures, who will be explaining the design and delivery of hybrid structures with green credentials, Daniel Kressig, Sales Engineer at Züblin Timber, will be discussing complex structures in timber, Jannick Jahnke, Sales Engineer at Simonin SAS, will be raising important questions surrounding glulam roofing solutions. Environmental Impact Under the banner of ‘Architecture is Political: It’s Time for the Timber Revolution’ Anthony Thistleton, founding Partner of Waugh Thistleton Architects, will be discussing the politics of architecture and sharing his views on dramatically reducing CO2 to minimise global warming.

“We need to be generating working, sustainable forests that are geared towards the massive task in hand. Architecture is political, and as architects, we have the responsibility to address the principal issues of our age. None is more critical and with such a severe potential as the threat of climate breakdown. The built environment is the primary source of CO2 emissions we must address the embodied energy in our construction. Using CLT is not simply ‘good for the environment’ it has the potential to save the world.”

02 Ground-breaking Case Studies

Center Parcs – Elveden Forest One of the pioneering projects to be explored during the conference is the Metsä Wood development for Center Parcs. Metsä Wood presented a structural design for the lodges, proposing portal frames of Kerto® LVL to make the structures stable and easy to assemble. The three architectural waterside lodges are located on the bank of a beautiful lake nestled in the heart of Elveden Forest. These lodges are the first accommodation to overhang Elveden’s lake. The engineered timber blends into the natural forest surroundings to create an authentic woodland haven. From the side, each cabin has the appearance of an upturned boat, featuring an elegant fin. Apart from their stunning architectural and structural design, these lodges are innovative in their use of engineered wood products, which are cost-effective compared to alternative materials and quick to

CONFERENCE DETAILS The event consists of a bespoke exhibition of circa 25-30 companies from within the engineered timber technology sectors, plus complementary solutions such as structural insulated panels (SIPS), cladding and fenestration solutions. The Solid Wood Solutions conference and exhibition will take place on 21 May 2019 at the 99 City Road Conference Centre, Inmarsat, London – tickets are £125 + VAT which includes refreshments and lunch. For further information on exhibiting contact: julie.williams@radar-communications.co.uk or call 01743 290042 For more information or to book you place visit:

www.solidwoodsolutions.co.uk

construct, minimising environmental impact. The architect was inspired by the curved hulls of the boats on the lake, which are reflected in the lodges’ elegant arches. The Stephen Perse Foundation – Cambridge Another key case study covered in the conference is the hugely successful Stephen Perse Foundation project, which comprises a group of leading independent schools in central Cambridge. The spatially complex building combines a basement sports hall, a rooftop games pitch with flexible learning and social spaces. The hall has been designed with a range of integrated equipment to facilitate all curriculum sports. An adjacent Victorian building was reformed into a reception and office space, linked to the main building by a lightweight glazed bridge. The reception interior is formed by a continuous ribbon of oak veneered timber which ties the different functions of this space together. Facing the main school courtyard, a stepped double-height space creates a new multi-functional heart to the school. This architectural development opens out beneath a high canopy, which is supported by a woven structure of deep glulam beams and twisting columns.

IMAGES: 01. Stephen Perse Foundation. Courtesy chadwickdryerclarke studio 02. Center Parcs, Elveden Forest. Courtesy Metsä Wood

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AIMCH

THE FUTURE OF HOUSING DELIVERY

01 A new housing industrialisation project could be key to tackling the housing crisis. Stewart Dalgarno, AIMCH Project Director and Director of Product Development at Stewart Milne Group, outlines what this new development could achieve.

02 The government has stated that the UK needs an additional 120,000 homes each year to address the housing shortage. That’s a challenge that the housebuilding sector simply can’t meet using traditional construction methods alone. There are too many hurdles to overcome for that to be a realistic option – skills shortages, an aging workforce, poor productivity, low output and a materials shortfall, to name but a few. A high standard must also be maintained for housebuilding. Homes need to be affordable, energy efficient, and of a high quality, leading to increased customer satisfaction and improved building performance. Industrialisation through digital working, offsite construction and lean site assembly processes can be part of the solution, but they have not yet broken through as viable mainstream alternatives to traditional methods

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of building homes. The Advanced Industrialised Methods for the Construction of Homes (AIMCH) project aims to change this. AIMCH, which received £4million of funding from Innovate UK under the Industrial Strategy Challenge Fund, aims to develop industrialised near-to-market panelised offsite solutions. The ultimate goal of AIMCH is to deliver homes which are built 30% more quickly and with a 50% reduction in defects, yet cost the same or less to construct than traditionally built homes. The project has the potential to impact on 35,000 homes being delivered by AIMCH partners across the UK each year. The project will develop digitally integrated solutions around design standardisation, design for manufacture and assembly (DfMA) and building information modelling (BIM), linked to advanced manufacturing, supply chain

AIMCH

integration, enhanced offsite panelised systems and lean construction practices. The project will gather hard evidence and data from live sites to inform decision-making and business case for change and investment. We are confident AIMCH will be a major change catalyst in the housing sector by identifying and developing industrialised near-to-market panelised offsite solutions needed to meet current and future housebuilding demands. These will be benchmarked to current methods and solutions trialled on live housing projects, with successful new methods then being commercialised and brought to market in volume. We expect that the project will result in new digital design tools, manufacturing advancements, improved near-tomarket offsite systems and lean site processes. By leading to high quality homes that can be built quickly and viably, we believe AIMCH will be the catalyst the housing sector needs to move towards advanced digitally integrated manufacturing and site assembly, whilst overcoming the challenges that the sector faces today and helping it get to where it needs to go in the future. This collaborative innovation project involves a mix of housing providers and tenures, high-profile and entrepreneurial companies, differing offsite construction systems, and is backed by leading researchers. The project partners are all really excited about the possibilities of AIMCH and are confident it will be a gamechanger for the housing sector. It brings CSIC and the MTC’s innovation and industrialisation expertise and capability in key technologies such as design and simulation, and process and manufacturing systems development, including automation and visualisation, together with high profile housing and offsite manufacturing providers, who provide scale, innovation capability and a clear route to market. At Stewart Milne Group, we’ve always sought to innovate through digital working, advanced manufacturing and offsite construction. As well as developing around 1,000 homes a year, we also manufacture 8,500 offsite timber frame homes for third party

clients, with aspirations to double this in the future. As the UK’s largest housebuilder, the project’s private housing partner Barratt Developments PLC sold 17,579 homes in the year to June 2018. Barratt is forging ahead with its adoption of offsite production, trialling new technologies and strengthening supply chain relationships.

mainstream housing solution. Similarly, SME roofing contractor Forster Group wishes to develop and commercialise a novel kit of parts roof tiling system, including integrated PV, which fits perfectly with AIMCH’s aims.

The project’s social housing partner, L&Q, is one of the UK’s most successful social businesses, housing around 250,000 people in 92,000 homes, primarily across London and the South East. It aims to build 100,000 new homes over ten years, with at least 50% of these genuinely affordable, with 100% commitment to offsite construction. Tarmac is developing concrete offsite housing solutions, including piloting the manufacture of offsite concrete garages. This work provides the basis for AIMCH to trial the viability of a possible

AIMCH also has the support of Homes England, and is a named project within the Farmer Review, as an example of the type of game-changing industry project needed within the housing sector. What’s more, as well as providing much needed homes, AIMCH also has the potential to deliver wider sector benefits in terms of jobs, investment and growth. www.aimch.co.uk

IMAGES: 01. Stewart Dalgarno, AIMCH Project Director and Director of Product Development at Stewart Milne Group 02-04. Industrialised offsite solutions will be explored in depth by AIMCH over a three year R&D period. Courtesy MTC/CSIC

AIMCH The Advanced Industrialised Methods for the Construction of Homes (AIMCH) project, funded by Innovate UK, could transform how homes are built through industrialisation. The project is a collaboration between Stewart Milne Group, Barratt Developments PLC, London & Quadrant Housing Trust Ltd, Tarmac, the Manufacturing Technology Centre (MTC), the Construction Scotland Innovation Centre (CSIC) and Forster Roofing Services Ltd as the SME partner. The project will be managed by Limberger Associates. The three-year AIMCH project aims to tackle a range of challenges and become a major player in the housing sector by identifying and developing industrialised offsite solutions needed to meet current and future housebuilding demands. The project has potential to impact on 35,000 homes being delivered by AIMCH partners across the UK, each year.

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UK INDUSTRY NEWS R&D TO REDUCE HEAT LOSS IN HOUSING

One of Scotland’s leading contractors and manufacturers has taken the next steps to improve the energy performance of the typical home with research and development into heat loss. CCG (Scotland) Ltd has worked in partnership with energy and sustainability consultancy Carbon Futures to reduce the impact of ‘thermal bridging’ in the modern home. Thermal bridging describes an area of a building which has a significantly higher heat transfer than the surrounding materials, typically where there is either a break in the insulation or in masonry elements of a build or with openings such as windows and doors. Carbon Futures ‘thermal modelling’ assessment has considered the use of the firm’s ‘iQ’ timber frame system in the construction of housing and the results indicate that it is possible to reduce heat loss – associated with thermal bridging – by up to 30% when compared against government accredited construction details. In a typical two-storey home, this facilitates a 5% reduction in annual carbon emissions and an 8% reduction in energy required for space heating. The ‘iQ’ system is manufactured in CCG’s bespoke ‘OSM’ facility in Cambuslang and is used to

support the delivery of more than 1,000 homes per year, over 80% of which are for the public sector. David Wylie, Managing Director of CCG said: “At CCG, we pride ourselves on producing homes that are delivered to the highest standards of quality and environmental performance. The research undertaken with Carbon Futures will enable us to enhance our offering in these areas ensuring longterm benefits to our clients and the end user of our homes marking a significant step forward in helping tackle fuel poverty for people across Scotland.” David Russell, Director of Carbon Futures added: “A lot has been said about the performance gap in newbuild housing, therefore CCG should be commended for having the foresight to invest in the thermal performance of their timber frame product. As accredited thermal modellers, Carbon Futures were able to facilitate improved thermal performance in a cost-effective and practical way by using our technical experience and commercial awareness. Moving forward, the thermal improvement in CCG’s ‘iQ’ system puts them in a strong position to deliver carbon reduction targets in newbuild housing whilst maintaining commercial viability.”

SÖDRA OFFICIALLY LAUNCHES IRISH ARM Södra has officially launched Södra Wood (Ireland) Ltd, demonstrating the company’s investment in and commitment to the Northern and Southern Irish market. The launch was celebrated with 40 key figures from across the Irish timber industry at an event at Finnstown Castle Hotel, Lucan. Guests discussed prominent industry issues and learnt more about Södra’s wider business operation and its record-breaking 2018 from Jörgen Lindquist, President of the Södra Wood business area. Mr Lindquist, who also officially opened Södra’s UK operation in 2017, explained to guests how a continued focus on growth, sustainability and innovation will help ensure Södra is well-prepared for any potential future challenges. Kevin Peters, Sales Manager, Södra Wood (Ireland) Ltd, commented: “Crucially, whether we end up with a hard or soft Brexit, Södra Wood (Ireland) Ltd provides us with two options to supply to our Northern Irish customers. They could continue to be supplied out of our distribution terminal in Wicklow, Republic of Ireland or, in the event of a hard border, supplying out of Dundee, Scotland may be more convenient. “Whatever the outcome, we’re well placed to cope with any potential Brexit challenges. That said, while Södra Wood (Ireland) Ltd will certainly help combat any potential post-Brexit issues, the investment in Ireland is much more far-reaching. Along with Sweden, Holland and Great Britain, Ireland is very much a key market for Södra and an integral part of its long-term strategy.” www.sodra.uk

www.c-c-g.co.uk

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HUNDEGGER ROBOT-Drive MULTIFACETED FLEXIBILITY FOR ALL TIMBER CONSTRUCTION COMPANIES

SECOND PHASE OF DEVELOPMENT FOR NORBORD

Norbord is ploughing £35million into the second phase of development of its Inverness factory – taking overall investment in the past two years to £145million. Almost one year on from a £110million expansion programme to significantly increase capacity, the company will now invest a further £35million in a second wood room, heat plant and a dryer at the Morayhill mill.

Me and my Hundegger! Never change a winning team!

The development, due to be completed by 2021, will enable the mill to meet increased consumer demand for oriented strand board (OSB) across the UK and Europe. Alan McMeekin, Norbord Europe Managing Director, said: “The plan was always to invest further and we are pleased that the market has enabled us to make this investment much earlier than originally anticipated. The £35million investment will increase capacity and will deliver an increased level of support to our strategic customer base – further enhancing Norbord’s status as the world’s number one OSB producer.” The Inverness plant opened more than 30 years ago and was the first OSB mill in Europe. Last year, Scotland’s First Minister Nicola Sturgeon, unveiled the new manufacturing line at the plant following the investment, which was supported by a £12million development grant from Highlands and Islands Enterprise. Jerry Jones, General Manager at the Inverness factory, added: “This investment is a vote of confidence in our highly loyal Inverness workforce and supply chain, and the significant growth potential within the European OSB industry. I’m very proud to be at the helm of the Inverness factory at this very exciting time. The level of investment demonstrates how we’re evolving as a business in response to customer demand and puts Norbord in an even better position to efficiently serve our customers’ growing needs across the UK and in continental Europe.”

hundegger.com

JOINERY MACHINE HUNDEGGER ROBOT-Drive

Compact dimensions and modular design – the ROBOT-Drive offers maximum flexibility and almost unlimited processing possibilities for bars and panels. With the ROBOT-Drive, a 6-axis unit performs all the necessary work steps on the part – and in a single run. The solution for all requirements including timber glue construction from 20 x 60 mm to 300 x 1300 mm. The ROBOT-Drive is the most recent addition to the range of Hundegger joinery machines. Hundegger UK Ltd. Daniel Blades Snetterton Park, Harling Road Snetterton, Norfolk NR16 2JU Office: +44 (0)1953 660 331 Mobile: +44 (0)7940 714 599 d.blades@hundegger.com

Innovation in timber engineering

www.norbord.co.uk

RD_4c_93x267+3_Messe_GB_Daniel Blades.indd 1

12.04.2019 10:38:57

UK INDUSTRY NEWS SEVENOAKS MODULAR INVEST £6.5M IN METAL BOX SITE

Sevenoaks Modular, a Neath-based specialist in timber frame construction, aims to invest £6.5million in acquiring and regenerating a large part of an iconic industrial site in Neath. The old Metal Box factory site will undergo a renovation overhaul and is to be renamed the JCG Buildings. The company has been growing rapidly since it was formed in June 2018 on the back of a growing demand for modular construction solutions in the UK. This move should allow it to go from producing 1,000 homes per year to more than 3,000 per year. Sevenoaks Modular will acquire around half of the Metal Box factory site from Neath Port Talbot Council, which bought the factory in 2019. It will move all its operations to the site once it has been refurbished as will its sister companies Hale Construction and Hale Homes, both part of the Hale Group. Supported by the public and private sectors, the company will make a significant investment to regenerate the site and anticipates all the work will be completed and the site fully operational within 12 months.

Sevenoaks Modular specialises in windows, doors and external cladding as part of their prefabricated timber frame panels – with a view to offering fully modular volumetric buildings in the future. Sevenoaks Modular has an order book in excess of £10million all with tier one contractors and large property developers. It anticipates further rapid growth, which is partly being driven by government initiatives to build more homes quickly. Charlotte Hale, Director of Sevenoaks Modular, said: “This is about making a significant investment that will benefit the local economy, allow us to keep pace with demand and all while pushing an environmentally friendly agenda, both in terms of the style of construction we champion and in terms of how we will regenerate the site itself. “The entire site will be self-sufficient in terms of the energy it will generate and require – it will be a fantastic case study for the benefits of the circular economy. Our aim is to be sustainable, redefine the buildings and restore the site to its former glory but in an innovative and eco-friendly way. We want it to be a landmark of the town again, which the community can be

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proud of, while also benefiting the local supply chain and keeping jobs and money in the region.” Jonathan Hale, Chairman of Sevenoaks Modular and JG Hale Group, added: “The construction industry is increasingly moving towards more offsite construction methods that save time and money and this site is perfect for our expansion into this way of working across all the businesses. We look forward to creating many more high-quality jobs in the town and returning this site to its former glory.” The Metal Box factory site was occupied for more than 70 years by the Metal Box container factory but has been vacant since 2016. With support from the Welsh Government’s targeted regeneration Investment programme Neath Port Talbot Council bought the site in 2019 with plans to turn it into a business zone to create jobs. The entire site could provide space for up to 500 jobs with interest from a number of locally-based companies. Pictured: Charlotte Hale, Rob Jones (Neath Port Talbot Council), Jonathan Hale www.somodular.co.uk

MEMBRANES THREE IS THE MAGIC NUMBER FOR NEW MODULAR HOUSING SCHEME An innovative combination of three reflective, low emissivity wall construction membranes from Protect Membranes has been used to deliver the magic formula for a flagship affordable housing scheme in Swansea on behalf of Gwalia Housing / Pobl Group, delivering thermal efficiency benefits and reduced heat loss. Based on the former Four Seasons Social Club site, the development is made up of 41 timber frame properties, offering a mix of one, two and three bedroom homes that provide a modern living space in keeping with local architecture. Appointed by main contractor Morganstone, timber frame specialist Sevenoaks Modular Ltd constructed the wall panels offsite in their factory, followed by delivery and installation on-site. Installing Protect’s reflective membrane solution helped Sevenoaks Modular to reduce material waste during manufacture and value engineer without severely impacting

labour cost. The timber frame panels incorporated Protect TF InterFoil, a vapour permeable, reflective membrane installed on the cold side of the insulation, with the foil facing into an airspace to deliver low emissivity performance. This was combined with Protect TF200 Thermo, a reflective, external breather membrane and Protect VC Foil Ultra, an internal vapour control layer on the warm side of the insulation to help create a radiant barrier. This system achieved the client’s target U-value of 0.19W/m2K and achieved important insulation savings, with a reduced thickness of PIR needed for the 140mm stud without increasing the overall wall footprint.

Warren Rowlands, Senior Designer at Seveoaks Modular commented, “The use of Protect’s full reflective membrane system enabled us to not only value engineer this project but ensure a robust solution that provided affordability to the client. The innovative application of membranes offering low emissivity within unventilated cavities was easy to incorporate into our timber frame panels at the factory, ensuring the structure retained thermal efficiency and met our target U-value.” www.protectmembranes.com, email info@protectmembranes.com or call 0161 905 5700, quoting ‘Four Seasons.’

FIRE SAFE FAÇADE REFURBISHMENT A new replacement facade system being installed at a high-rise residential building in Leeds is bringing the structure up to compliance with new government guidance for fire safety. Two derelict blocks at Saxton Gardens in Leeds were completely renovated in 2007, providing 410 new apartments in an ambitious urban redevelopment. To give the blocks an aesthetically pleasing exterior, the architects designed the facades with varying window sizes, slot balconies and contrasting coloured cladding. Ten years later, an assessment of the facade design determined that the cladding used on one of the two blocks did not meet sufficiently high safety standards, and the decision was taken to upgrade the facade. EnviroSips Limited, specialist designers, manufacturers and installers of

structural insulated panel systems (SIPS), were engaged to carry out the facade refurbishment on behalf of the property management company. The existing 27m high facade is being removed and replaced with A2 rated, noncombustible cladding materials while the building remains fully occupied. The renovation is in full compliance with revised government guidance for buildings above 18m. One element of the system being installed is a superior flame retardant breather membrane. FlameOut Breathe is rated Class B-s1,d0, the highest level for flame retardancy in the Euroclass system. “This project represents an excellent example of providing an

integrated upgrade solution to bring this housing development in line with the most stringent fire safety standards. ITP’s flame retardant breather membranes work well to provide an efficient, safe cladding installation,” said Richard Evans, Director at EnviroSips and the ESL Group. Produced by North Yorkshire firm Industrial Textiles & Plastics (ITP), FlameOut Breathe is part of their flame retardant range of vapour control layers (VCLs) and breather membranes, including the UK’s only Class A2 non-combustible membrane. www.itpltd.com

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UK INDUSTRY NEWS CSIC & STA PARTNER TO BOOST TIMBER INNOVATION

L&Q LOOK TO TIMBER FRAME Stewart Milne Timber Systems (SMTS) has entered a partnership to deliver timber frame for more than 1,500 homes for L&Q, one of the UK’s leading housing associations. The company, which has three manufacturing centres in the UK, will also support L&Q on bids for standalone contracts in the open market.

Construction Scotland Innovation Centre (CSIC) and the Structural Timber Association (STA) have announced they are joining forces to support structural timber businesses across the UK to innovate and grow. The partnership will build on the existing relationship between the two organisations, formed through several key collaborative projects that CSIC has already supported, with both the STA and its member company’s CCG, Stewart Milne Group and Scotframe. This formal partnership will create a strategic relationship between CSIC and the STA. It will deliver a supporting programme of activities and provide numerous benefits for STA members, including: a series of innovation events for the timber sector, hosted at CSIC’s Innovation Factory, discount on use of CSIC’s Innovation Factory, which provides access to stateof-the-art equipment including an offsite cell and CLT/glulam vacuum press, as well as training and seminar spaces for up to 120 people. Plus support for STA members to understand the benefits working with Building Information Management (BIM). Stephen Good, Chief Executive at CSIC said: “CSIC is keen to develop partnerships with organisations like the STA whose objectives align with our own, because we know that by collaborating, we can deliver

greater support to groups of construction businesses to help them innovate and grow. “CSIC already undertakes a range of activity relevant to the structural timber sector, such as being an associate partner in Offsite Solutions Scotland and funding numerous collaborative projects with STA member companies. Formalising our existing relationship with the STA will offer greater opportunities for structural timber companies to participate in innovation activity and collaborate with client bodies, supply chain partners, public sector and academia.” Alex Goodfellow, Vice Chair of the STA added: “Innovation has always been at the heart of the structural timber sector and our alliance with the CSIC is testament to the very progressive and forward-thinking approach of our industry. Along with championing and supporting innovation, our partnership will also ensure that products, practices and new buildings are robustly tested, and performance is well understood and evidenced to maximise the benefits of technically advanced timber systems and offer assurances to clients and end-users.” Pictured: Stephen Good, CSIC Chief Executive and STA Board Member and Managing Director at CCG, Calum Murray www.cs-ic.org

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This deal forms a key part of L&Q’s innovative modern methods of construction (MMC) strategy, which will see all of its newbuild homes delivered with some form of MMC by 2025, with an entirely offsite manufactured home completed by 2028. This will support L&Q’s plans to build 100,000 homes over the next 10 years. Fiona FletcherSmith, Group Director of Development and Sales at L&Q, said: “Offsite manufacturing offers a range of exciting opportunities, speeding up the delivery and build quality of our developments whilst reducing the costs of projects.” SMTS were selected after demonstrating their ability to design, manufacture, supply and erect residential units up to six storeys tall. They combine this with their capabilities in Building Information Modelling, a 3D digital construction planning tool, which streamlines how different elements of a project are brought together. The closed-panel timber frame structures will initially be used in the construction of L&Q’s new Counties developments at Birnam Mews, Tiddington and Saxon Reach, Milton Keynes, with the first deliveries in spring 2019. L&Q’s £5million per year Academy will accompany this with investment in upskilling apprentices and staff in MMC techniques. www.labmonline.co.uk

IMPROVEMENTS IN SAP* FROM USING THE HYBRID SYSTEM RESULTED IN LOWER PROJECT COSTS Peter Dawson, Housebuilder

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UK INDUSTRY NEWS NEW ECO-HOMES TO ENSURE PERMANENT AFFORDABILITY Dave Lomax, Senior Associate at Waugh Thistleton Architects added: “We hope this project will become an exemplar and that the practices and offsite elements designed and developed here can be reproduced on similar sites across the country. Working so closely with the community to create homes that work for local people, both as potential residents and as neighbours has been a great experience.” Based on the site of a former tree nursery on Mincing Lane, at the edge of the village, the new homes have been designed to the highest standards of sustainability using Bioregional’s ten One Planet Living principles. Sustaining Chobham has worked with Bioregional Homes and Waugh Thistleton Architects to co-design the homes and will then own the site in perpetuity, acting as long-term stewards of the homes to ensure that reduced house prices for people living locally will be protected permanently. Homes will be sold to local residents at a discount of between 40% and 20% compared to market levels.

Bioregional Homes, working with Waugh Thistleton Architects and Sustaining Chobham, a Community Land Trust (CLT), has submitted a planning application to build 30 new affordable homes in the village of Chobham, Surrey. The homes, located in a mature woodland setting, have been designed in partnership with members of the local community and, through the CLT, the scheme will be owned and managed by residents and held permanently available to local people at reduced prices.

Sue Riddlestone OBE, CEO of Bioregional and a Director of Bioregional Homes says: “Our vision for the site is to build homes for people on everyday salaries where it’s easy and convenient to make sustainable choices and for people to get to know their neighbours. This is a new model of property development and home ownership which we are excited to be pioneering. It’s early days, but there is such a lot of interest. We have been contacted by a number of community organisations and landowners and have half a dozen follow-on projects in the pipeline already.”

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The homes will have low energy bills and net zero carbon emissions. This is thanks to highly efficient building fabric, no on-site fossil fuel combustion, rooftop photovoltaic arrays and a commitment to purchase zerocarbon electricity. The building envelope will be constructed offsite in timber, allowing the build to happen quickly, accurately and with minimum disruption to the surrounding environment. The offsite fabrication will also provide opportunities for local businesses. This is the first of Bioregional Homes’ projects to be submitted for planning permission since the company was created by Bioregional in January 2018. The company was launched with the support of the Mark Leonard Trust and the Treebeard Trust. www.bioregional.com/bioregional-homes

Egger Advanced Structural Flooring System. A lifetime guaranteed. www.egger.com/lifetime

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UK INDUSTRY NEWS NEW TIMBER FRAME BUSINESS OPENS IN WALES

Housebuilding in South Wales is set to become faster and more efficient with the opening of a new timber frame business in Nantyglo, Blaenau Gwent. Taylor Lane (Wales) Ltd will produce timber frames for newbuild developments across the region. The launch event gave thanks to those who had aided and supported the new venture. Having purchased the premises on Limestone Road, Taylor Lane (Wales) is committed to the area. With over 30,000ft2 of manufacturing facilities, the company will provide timber frame solutions for contractors, developers and self-builders, and offer complementary products and services including design, estimating and project management. The business has provided immediate employment for local, skilled workers. As an independent business, Taylor Lane (Wales) represents a new challenge for Managing Directors, Barrie Lane and Colin Taylor. “We saw an opportunity to establish a new business and Wales made economic sense, as a location and employment base,” comments Barrie Lane, Managing Director of Taylor Lane (Wales). “We have already received incredible support and encouragement from the Council and local business leaders. We are looking forward to extending the facility and services of Taylor Lane (Wales), as the Welsh

Government pledges funds to build 20,000 affordable homes over the next four years.” Taylor Lane (Wales) welcomed Blaenau Gwent County Borough (BGCBC) Council Cabinet Members for Regeneration and Economic Development, Councillor David Davis and Deputy Leader – Councillor Garth Collier; members of the BGCBC environment and regeneration team, Director Richard Crook and Head of Regeneration Ellie Fry; Councillor Wayne Hodgins; representatives from Thomas Carroll Group and NatWest. Councillor David Davies, Executive Member for Regeneration and Economic Development added: “We are delighted that Taylor Lane have chosen Nantyglo to establish a new timber frame business. This will provide an added boost to the building industry in our area, especially as the Welsh Government is committed to building affordable homes throughout Blaenau Gwent. Additionally, timber frame house construction offers many benefits, they are quicker than traditional buildings to construct and provide many environmental advantages”. (Pictured L-R) Taylor Lane (Wales) joint managing director, Barrie Lane; former Wales International and British Lion, Brynmor Williams and Taylor Lane (Wales) joint managing director, Colin Taylor. www.taylor-lane.co.uk

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KNAUF INSULATION APPOINTS NEW MD Knauf Insulation has appointed Neil Hargreaves as its new Managing Director for the Northern Europe region. In his new role, Neil will be responsible for strengthening the company’s leading position in the mineral wool insulation industry. Previously, as Finance Director, Neil led a number of strategic projects for the business. He takes over from John Sinfield, who is leaving to pursue a new opportunity outside the company. “I’m delighted to take up this new role at such an exciting time for the mineral wool insulation market,” said Neil. “I’m looking forward to building on John’s work to make us the supplier of choice for all our customers across the region.” Jean-Claude Carlin, Group CEO of Knauf Insulation, said: “I am sure that Neil will continue the excellent work already taking place in the region, and lead it through the next phase of development. We would like to express our appreciation to John for his excellent work and leadership over the last nine years. We wish him all the very best in his future endeavours.” Knauf Insulation is the UK’s leading provider of high-performance, noncombustible glass and rock mineral wool insulation solutions. It is part of the Knauf Group, a €6.5billion turnover multi-national family-owned manufacturer of building materials and construction systems. The company has announced significant investment plans in 2019, including the opening of a new rock mineral wool manufacturing plant in France expected later in the year. Prior to joining Knauf Insulation, Neil trained as a Chartered Accountant with KPMG. www.knaufinsulation.co.uk

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TIMBER CONSTRUCTION CONNECTORS Connectors developed for modern timber construction

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UK INDUSTRY NEWS NEW TIME SAVING NEW PANEL FROM MEDITE SMARTPLY a clear market need. When speaking to Dryliners and contractors dealing with plasterboard partitions, it became clear that installing pattressing is one big headache. We found that the current boards they use require cutting on site, which creates large amounts of dust and noise, that in turn creates additional health and safety risk, plus the use of additional metalwork and fixings adding time and complexity, all resulting in extended installation times. The latest product from MEDITE SMARTPLY is now available to order. Ideal for contractors who construct plasterboard partitions, PATTRESS PLUS panels feature a continuous recess along one side that is designed to accommodate ‘C’ studs without the need to cut in slots on site. This key design feature means that each panel sits flush against the stud flange, holding steady while you simply screw the other side into place. The finished result means a massive reduction in dust – as no cutting is required, drastically reduced

MORE TESTING FOR TIMBER WINDOWS AND DOORS The Joinery Network is a cooperative of leading industry suppliers, bringing expertise, practical support and certified products to grow timber window and door businesses, and have invested in product testing. “Joiners need easy access to PAS24 security certification for timber windows and doors to comply with Document Q of Building Regulations,” says O T Dare Joinery Consultant, Owen Dare, and one of the founder directors at The Joinery Network.

noise – due to fewer power tools, and much less time spent cutting and installing panels which can save hours, if not days, on big installations. PATTRESS PLUS panels are available in thicknesses of 15mm or 18mm, widths of 397mm or 597mm (to fit 4oomm and 600mm stud centres), and lengths of 1250mm or 2397mm, in line with leading plasterboard partition specifications. Head of Marketing and Brand at MEDITE SMARTPLY, Stuart Devoil, said: “PATTRESS PLUS panels have been created to meet

“The Joinery Network booked two weeks at the testing house for an initial batch of products to cover BS 6375: 1 for weathertightness and thermal performance, PAS 24 and Approved Document Q for security, and Part M to ensure that people are able to access and use buildings and their facilities. We recognise that joiners need test results for all the windows and doors they’re making. It means a much broader range of products, options and styles must be tested, to ensure the results can be cascaded to comply with Building Regulations. “We are aiming to build up the product portfolio, to give joiners a comprehensive range to choose from. Day one saw passes on the box sash and flush casement

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“We just wanted to reduce the risk and complexity, whilst saving them some time into the bargain. With our expertise in developing innovative timber panel solutions we knew that this latest technology will help tradespeople to create a safer working environment while saving them time and money. We’ve already trialled the product with one plastering contractor who said he’ll never go back to traditional panels after using PATTRESS PLUS.” https://mdfosb.com/en/smartply/products/ pattress-plus

window, and the second day we added single doors opening both in and out, including low thresholds to comply with Part M. We have included full glazed, half-glazed and panel door options, opening both in and out. All permutations of French doors are also being tested during this time. We will continue to add more products including thermalite windows, stormproof flush sash and aluclad options.” Joiners can get a licence from The Joinery Network to use the cascaded data to offer products compliant with the regulations, whether it’s for PAS24, Part Q or Part M. www.thejoinerynetwork.co.uk

Imagine what a tree can do Imagine what a tree can do

Building Systems based on CLT and LVL are a new way of building with wood, balancing today's needs with the needs of future generations. We offer a structured approach to your dreams and ambitions. Find out more: www.storaenso.com/buildingsystems

UK INDUSTRY NEWS JAMES JONES & OCKWELLS WORKING TOGETHER

James Jones & Sons’ Timber Systems Division, the maker of the UK’s marketleading I-Joist system, JJI-Joists, has entered into a partnership with specialist building and protection materials manufacturer Ockwells, which will see it recommending Ockwells’ Stairwell Hatch System to all JJI-Joist customers in the future. After months of research in to available stairwell protection systems, James Jones’ Timber Systems Division has opted to recommend the Ockwells temporary site protection system because of its superior build quality, flexibility in applications of use and the simplicity of installing the system to house building and construction sites without adaptation to existing build practices. Independently tested and verified, the Ockwells Stairwell Hatch System is designed to provide full cover platforms over the stairwell openings in various

combinations to suit all build sites and conditions. Once installed, the system prevents falls through large stairwell opening whilst giving access for operatives and materials. The system is designed to be lightweight for handling and ease of use on site and it allows safe and fixed access to a ladder prior to a staircase being fitted. The system comprises three parts – hinged and framed glass reinforced plastic (GRP), a steel ladder plate for securing a ladder and a steel box sections adjustable telescopic joist, which allows openings next to party walls to be accommodated by the system. Mark Tilston, Systems Development Manager for James Jones’ Timber Systems Division, said: “Stairwell protection systems is something that our business has been investigating and researching for a while now and we are delighted to have found in Ockwells a partner that provides a robust and safe solution for all JJI-Joist distributors and end users.

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“The Stairwell Hatch System is well designed, solidly manufactured and above all, it works. They have also produced a simple step by step installation guide which gives you clear advice on many applications. The system allows you to continue using crash deck systems and bird cage platforms which is unique. Their product has been independently tested to give you confidence.” John Gray, Sales Director at Ockwells, added: “Ockwells are delighted to be partnering with James Jones’ in this new and exciting development. Having spent a great deal of time developing the Stairwell Hatch System it’s great to see that our customers are seeing the benefits from our safety system. We believe that the combined expertise of James Jones’ and Ockwells will result in significant health and safety and cost benefits to James Jones’ customers.” www.jamesjones.co.uk www.ockwells.com

Whatever you ask of it, a JJI-Joist has the answer every time. No ifs. No buts. No matter how complex or awkward the job, we have built the ultimate can-do joist. By manufacturing to the highest specification our I-Joists are light, strong, thermally efficient, BIM compatible, FSC and PEFC certified and PAS 2050 accredited (to cut a long list short). But it’s also the back-up we offer that no one can equal. Our expert team of designers, engineers and regional technical support is always there to say ‘yes we can’.

WEB: www.jamesjones.co.uk/ewp

EMAIL: jji-joists @ jamesjones.co.uk

UK INDUSTRY NEWS WORLD’S TALLEST TIMBER BUILDING CONFIRMED

TTF & WPA TEAM UP The Timber Trade Federation (TTF) and the Wood Protection Association (WPA) are joining forces under a strategic partnership agreement aimed at strengthening the UK market for treated wood. The agreement focuses both organisations on working together to tackle the ‘priority actions’ that came out of an industry survey conducted jointly by TTF and WPA in 2017/18.

The Council on Tall Buildings and Urban Habitat (CTBUH) has verified the completion of Mjøstårnet, a mixeduse building in Brumunddal, Norway that now holds the unique title of the “World’s Tallest Timber Building.” At 85.4m, it is also the third-tallest building in Norway and the country’s tallest with mixed functions. This news coincides with the amendment of the CTBUH Height Criteria – the official guidelines upon which tall buildings are measured – to include timber as a recognised structural material. The update was prompted by the recent uptick of tall timber buildings currently under construction or in planning around the world, and the interest of involved stakeholders and the general public in defining what truly constitutes a ‘timber’ structural system. According to the revised criteria for timber structures: “Both the main vertical/lateral structural elements and the floor spanning system must be constructed from timber. An ‘all-timber’ structure may include the use of localised non-timber connections between timber elements. A building of timber construction with a floor system of concrete planks, or concrete slab on top of timber beams, is still considered a ‘timber’ structure, as the concrete elements are not acting as the primary structure.” Mjøstårnet is appropriately located in an area of Norway known for its forestry and wood processing industry, sitting just meters away from Mjøsa, the country’s largest lake. Wood was chosen as the structural material due to recent advancements in the field of mass timber – particularly following the increased availability of large glulam timber, and cross-laminated timber (CLT) structural elements. Moelven Limitre, the project’s

This survey highlighted that three key issues had to be addressed if demand for treated wood in the UK was to grow. These included: tackling a general failure of buyers to specify pre-treated wood correctly, improve user awareness about how to install and use pre-treated wood correctly, and build confidence in the performance of treated wood through independent verification of treatment quality. structural engineer, supplied glulam columns, beams and diagonals, CLT elevator shafts, stairs, and floor slabs. The company was also responsible for the direct installation of the wooden structures in the building. CTBUH Height and Data Committee, chaired by Scott Duncan, a partner with global design firm Skidmore, Owings & Merrill, was created to establish and, when necessary, refine the official Height Criteria upon which tall buildings are defined and measured. As such, the committee meets on a regular basis to discuss: the latest developments in the tall building industry, possible additions or revisions to the criteria, and occasionally, specific buildings that are particularly complex and which require close evaluation to determine their height and/or categorization in accordance with the established criteria.

Commenting on the agreement TTF Managing Director Dave Hopkins said: “This strategic agreement is based on a mutual desire of the TTF and WPA boards to work more closely on matters of common interest.” WPA chief executive Gordon Ewbank confirms that it is the synergies between the TTF and WPA that made the partnership agreement an obvious strategic move, saying: “The WPA’s technical knowledge bank, standards and regulatory expertise together with our profile in the European wood protection market is a great match with the TTF’s timber supply chain understanding, communication networks and lobbying influence. This is not a merger. The partnership agreement is very much focused on combining resources to deliver a joint action plan for the benefit of the members of both organisations.” www.ttf.co.uk

www.ctbuh.org

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UK INDUSTRY NEWS ROBOTS READY FOR CONSTRUCTION Researchers from Robert Gordon University’s (RGU) Scott Sutherland School of Architecture and Built Environment are conducting a research project into an innovative housing construction method which could help to bring down the cost for house buyers. In collaboration with the Construction Scotland Innovation Centre (CSIC) and timber engineering firm, Glulam Solutions Ltd, the project will focus on the robotic fabrication of a cross-laminated timber (CLT) joint. At the moment, most construction takes place as manual assembly onsite, which can lead to delays, inaccuracies, material defects and material waste. Robotic offsite fabrication will bring the benefits of industrialised production systems to construction. Theo Dounas, Learning Excellence Leader at RGU, believes the research project has

the potential to significantly improve construction methods, helping to increase the quality and output while reducing costs and time. “This proof-of-concept research project will look at process of designing a simple timber prototype house to address pressing market needs within Scotland and the UK,” he said. “The innovation lies with the integration of a house design prototype and its robotic fabrication out of complex CLT panels manufactured offsite. “At the end of the project, we envision that the consumer, the house buyer, will be able to select various options from a website and then we will be able to produce all components based on consumer demand. It is hoped that through this initial project, our solution could bring dramatic benefits not just to the Scottish housing market, but also to the Scottish construction market. We would then hope to develop a range

of ideas and solutions, from logistics, to design, to the real testing of CLT joints, and formation of insulated composite panels. While this particular solution is tightly integrated with one design product, it is likely to be relevant to other building projects. We plan to develop a family of houses and other buildings using the technology developed through the project.” Syd Birnie, Managing Director of Glulam Solutions Ltd, said: “This is our very first project linking an academic concept to our commercial approach and it’s an exciting prospect getting the chance to use CSIC’s robotic facilities. We are crying out for more innovation in the construction industry and we hope this is the first of many real advancements for timber engineered building solutions.” www.glulamsolutions.co.uk

‘EXTREME’ WALL MEMBRANES DELIVER CLASS W1 PERFORMANCE FOR SEVERELY EXPOSED SITES Protect Membranes, UK producer of construction and roofing membranes, has introduced two new waterproof breather membranes designed for use externally on timber frame, SIPs and CLT wall panels, achieving a Class W1 resistance to water penetration. Launched in tandem with the STA Advice Note 18 published by the Structural Timber Association in consultation with the NHBC, the products are designed specifically for buildings sited in severely exposed locations which are typically high altitude, open to high winds and on westerly coastal sites in England, Ireland, Wales and Scotland.

permeability. This protects the outer sheathing from moisture and allows vapour to pass into the external wall cavity. Featuring a highly reflective surface, Protect Thermo Extreme helps deliver low overall U-values when the foil faces into an unventilated airspace, achieving an aged thermal resistance R-value of 0.77m2K/W, incorporating printed branding.

Protect Thermo Extreme is a low emissivity, insulating breather membrane with microporous film and microperforation technology to ensure high watertightness and vapour

Protect TF200 Extreme is a high performance membrane used on the cold side of the insulated panel to minimise the risk of interstitial condensation, with microporous film

technology to ensure high vapour permeability and exceed requirements recommended by TRADA and NHBC. It offers a temporary, first line of protection to the whole of the external wall. Both membranes are CE marked, available ex-stock in 3m widths and 100m lengths and produced in the UK. www.protectmembranes.com, email info@protectmembranes.com or call 0161 905 5700, quoting ‘Extreme.’

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TIMBER ESTIMATING GUIDE storey housing development with 100 units, and a two-storey hotel with 40 ensuite bathrooms and a reception area. The guide provides:

MAXIMISING TIMBER BENEFITS

• A detailed overview of how structural timber companies tender for projects, providing all-inclusive services that encompass the design, manufacture, delivery and installation of the structural frame to create a single point of responsibility • A sufficient amount of data to allow for a comparison between forms of construction. Each of these methods can be benchmarked against industry standards to ensure consistent quality across all applications • An explanation of the benefits that structural timber systems provide and how it can enrich construction projects.

01 The Structural Timber Estimating Guide 2019 has been developed by leading cost management organisation Rider Levett Bucknall (RLB) to provide financial and technical information for construction industry professionals. The guide provides information for early estimates and budget preparation, equipping cost managers and estimators with a range of prices and data that can be used to demonstrate value for money. The structural timber industry is responding well following the announcement in 2017 that five central government departments will adopt a presumption in favour of offsite construction for all publicly-funded projects. The demand for structural timber systems has increased year-onyear and the industry is innovating and gearing up to meet demand.

The new adaptation of the Timber Estimating Guide is an authoritative source that raises awareness of the benefits of using timber frame systems as a core structural component. RLB adopted a cohesive approach when creating the guide by collaborating with a range of construction professionals, including clients, contractors, architects, engineers, house builders and quantity surveyors. The guide provides information to aid budget estimation and preparation, which should be established as early as possible in the construction lifecycle so that improved value and efficiencies can be incorporated from the design stages. The guide provides cost estimates to aid the specification of thermal, acoustic and airtightness properties, which can vary hugely depending on the buyers, specifiers and purchasing managers’ objectives. The costs detailed in the guide are based on three timber frame projects, with a summary and detailed cost breakdown for each. The model projects include a three-storey apartment block with 12 units, a two-

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RLB have provided a summary specification of all services, materials, plant and labour that is included within the costs for the three model projects. Also included within the costing tables are the commonly selected extras and options required by clients and specifiers. Andrew Carpenter, Chief Executive of the Structural Timber Association (STA), said: “We welcome this guide and the in-depth findings. The STA commends Ian Dacre and Rider Levett Bucknall UK for compiling the Timber Estimating Guide and would also like to thank the STA members who contributed to this research.” Further RLB guides on cross laminated timber (CLT) and structural insulated panel systems (SIPS) will be released in autumn 2019. RLB has also created a Timber vs Masonry Report to support quantity surveyors by drawing cost comparisons between drawings and outline specifications for a collection of house designs. You can download a copy from the Publications section on the RLB website at www.rlb.com To download a PDF of the Timber Estimating Guide from the STA’s online library visit: www.structuraltimber.co.uk/eg IMAGES: 01. Timber Estimating Guide 2019

dRMM

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The history of architecture can be understood by material development rather than successive styles. For example, 18th century was defined by brick, the 19th century by steel and the 20th by concrete. In 2004 I predicted that engineered timber would define the 21st century. dRMM has explored its endless potential ever since. When the Building Centre invited dRMM to stage a new exhibition presenting their timber architecture, the ‘Forest of Fabrication’ exhibition and symposium was conceived. The show features 24 dRMM projects designed across 24 years — 12 built and wellknown, 12 unbuilt. All have pushed design and technical boundaries in exploring the opportunities and challenges of timber structures. The exhibition showcases models of the original Naked House, Kingsdale School, Timber Stadium, Endless Stair, Floatopolis, Sky Health & Fitness, Maggie’s Oldham and the Stirling Prize winning Hastings Pier. It also includes research projects including Timber Tower, a mixed-use 160m tower

dRMM

designed as a timber homage to Marina City, Chicago and a relevant proposal for today. Why do architects want to build high? Especially in timber? Like testosteronefuelled explorers driven to go further, the challenge is apparently irresistible. The biggest erection wins the global reputation, the research stakes, the media interest, the TED talk and naturally the short-lived title, the World’s Tallest Timber Tower… but this is a recent preoccupation of the profession. dRMM Architects were and are pioneers of engineered timber architecture in Europe, exhibiting the first crosslaminated flatpack prototype house in Oslo in 2006, and realising school buildings from 2007. In 2009 dRMM proposed a 6000 seat Handball Arena for the 2012 London Olympics, and a ten storey all-timber apartment building design to developer Lendlease for the Athlete’s Village. This was eventually built in concrete frame, but Lendlease did go on to build ‘Forte’ a 10 storey CLT tower in Melbourne in 2014 and many timber projects subsequently. In 2008, dRMM, collaborating with Norwegian practice Helen & Hard, proposed 14 storey timber towers in Stavanger, Norway. These were designed as all-timber structures and eventually built in 2014 as a concrete and timber hybrid. A decade later many architects want to build in timber, and predictably want to build high. But how high is high in timber? Although unbuilt proposals have competed for the title, including the 2016 PLP Architects 80 storey ‘Toothpick’ in London via Cambridge University, currently the world’s ‘tallest timber tower’ built at 85.4m is Mjøstårnet in Brumunddal, Norway completed in March 2019 by Voll Arkitekter. However, in the UK building very tall residential buildings in 100% timber is less likely following the UK Government’s decision to ban timber in the external walls of residential buildings over 18m. Architects and manufacturers are now developing new façade systems which can be used alongside CLT core, floors and internal walls to meet the new regulations, and continue the drive to build high in residential.

However, the relevant question is not how high can you build, but do you really need height to achieve urban density? And if so, at which height does it stop making sense to use 100% timber?

as well as new high density 6-12 storey building typologies — i.e. how we make cities desirable and sustainable places to live and work. Mixing in but reducing steel and concrete to the absolute minimum, whilst exploiting timber’s unique ability to invert the construction industry paradigm for carbon production, pollution and waste is the desired future.

As a timber architecture specialist I hesitate to advocate very tall all-timber structures for the sake of simply being higher, or to pretend that what are inevitably hybrid structures are actually ‘timber’ towers, as often claimed. Concrete, steel, glue and glass are always essential components of the design – what is important are the ratios. To build high in 100% timber, whether as a frame or mass wood panel construction can mean using more timber than is efficient. The top-down progressive compression loads on a timber frame mean that the lower levels of a tall tower would literally be a forest of wood. The considered answer to this century’s architecture is not the ‘tallest timber tower’ but clever composite structures

For over 30 years in academe and practice I have been an outspoken advocate of engineered timber’s outstanding versatility, weight to strength performance, sustainability, speed and limitless expression. I will continue to in the UK and internationally, with the added imperative of the climate change crisis. www.drmm.co.uk IMAGES: 01. Maggie’s Centre, Oldham 02-03. Forest of Fabrication exhibition 04. Hastings Pier was crowned the UK’s best new building, winning the 2017 Royal Institute of British Architects (RIBA) Stirling Prize

The Forest of Fabrication exhibition being held at the Building Centre in London will run until 17 May 2019. For more details visit www.buildingcentre.co.uk/exhibitions/forest-of-fabrication

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SOLID WOOD

LEARNING THE HYBRID WAY

01 The new Science and Mathematics Centre at Charterhouse School is an exemplar of hybrid construction, demonstrating the way in which materials can work together to overcome complex design and engineering challenges. Eve Dennehy reports.

The scheme by Design Engine Architects combines the structural benefits of cross laminated timber (CLT), glulam, steel frame and reinforced concrete to create a modern and welcoming learning environment that complements the school’s historic Godalming campus. The building is Design Engine’s third completed project for Charterhouse and the first of three phases to co-locate science and mathematics teaching, which will eventually result in a full STEM Centre. Originally the subject of an invited design competition won by Design Engine in 2009, the School’s brief asked for ‘a building that represents the essence of modern science teaching – respectful of the

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past, enquiring in its formulation, advanced in its thinking and concerned in the understanding application of its potential’.

“Our aim in response to this brief was to provide a modern, high-quality environment,” explains Matthew Vowels, Senior Architect at Design Engine. “That would allow Charterhouse to continue innovating in their teaching methods, and ensure the School remains one of the leading academic institutions in the country.”

CONFERENCE | EXHIBITION

21.05.2019

99 City Road, London

Pioneering Engineered Timber Solid Wood Solutions conference and exhibition will be returning for 2019. The event will reflect the swift upward trajectory that materials such as cross laminated timber (CLT) are now on as a sustainable, structural alternative to steel and concrete. Shining a spotlight on pioneering projects through informative case studies presented by those who conceived and developed the buildings that are gaining global attention, Solid Wood Solutions presents a great opportunity to gain insight and network with those who are shaping the future of the engineered timber industry.

SPEAKERS INCLUDE: CHAIR: Nick Milestone – Trada Anthony Thistleton – Waugh Thistleton Architects Ricardo Candel – AKT II Kelly Harrison – Heyne Tillett Steel John Spittle – Wiehag Frank Werling – Metsä Wood UK Andrew King – Constructional Timber Robin Dryer – Chadwick Dryer Clarke Panayiotis Papastavrou – Smith and Wallwork Andrew Goodwin – B&K Structures Daniel Kreissig - ZÜBLIN Timber Jannick Jahnke – Simonin SAS Rainer Strauch – Cree by Rhomberg Gareth Mason – Stora Enso Prof. Alex de Rijke – dRMM Architects

Tickets cost £125 + VAT

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SOLID WOOD Development Manager at Stora Enso who manufactured the CLT used for the project. “It also demonstrates the way in which an ultra-modern building can sit comfortably within an historic setting such as Charterhouse.”

04 The result is a modern, innovative building that sits comfortably within the Charterhouse campus which was designed by Phillip Charles Hardwick in the 1870s. The campus has many listed and neo-gothic buildings with connections provided by traditional colonnades, quads and courtyards and it was this historic context, along with the functional requirements of the chemistry laboratories from which Design Engine drew inspiration. The Centre provides space for seven chemistry labs, five teaching rooms, a project research room and a selection of staff areas. It is a two-storey structure formed of a podium slab of reinforced concrete and exposed soffits to the ground floor spaces, with a CLT and steel structure above. The building is laid out as a simple ‘L’ shape with a central, full height CLT staircase in the main entrance at the knuckle of the ‘L’. An overall area of 1700m2 is predominantly dedicated to teaching areas and laboratories which measure a generous 113m2 each.

03 The new building abuts the school’s existing Grade 2 listed museum, interfaced by a complex steel frame which cantilevers over a single-storey section of the adjacent museum. To the courtyard side of the building, a ground floor external colonnade provides circulation directly into the teaching spaces and at first floor this circulation is internalised by a glazed corridor. As the circulation wraps around the south west corner of the of the building, it joins a staircase to the ground floor which is ‘hung’ on one corner from roof level and cantilevers out at first floor with a series of external columns as it rises up. Three distinctive, steeply pitched roof structures, or ‘chimneys’, provide a striking architectural feature and a subtle yet important architectural link to the original campus where these forms feature widely. Structurally CLT has provided an efficient way of achieving the uninterrupted 6m tall partitions for the first floor laboratories. These floor to ceiling height CLT panels are tied back into the chimneys, reinforcing the importance of those forms in terms of services, structure and architecture. “The new centre for Charterhouse School really plays to the strengths of CLT as a versatile, precision engineered structural material that can meet complex engineering requirements without compromising on design,” says Gareth Mason, Business

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The CLT structure has walls supporting the roof at approximately 8.1m centres with the overall structure supported by a central vertical steel ridge beam. On one side of the ridge beam, the CLT spans continuously between the walls, and on the other side an unusual geometry is formed by an inclined CLT wall that sits on a glulam beam which also supports the CLT at either side. CLT forms part of a mix of contemporary and traditional materials along with oak, brick and glulam that reflect the materials already featured in the School estate. Internally, the exposed CLT has been treated with an overall 5% white tinted Class O surface spread of flame lacquer. “We were keen to retain natural finishes as much as possible, recognising that the quality of the environment has a profound impact on the ability of teachers to teach and students to study and learn,” says Matthew Vowels. “CLT has warmth and honesty which we felt was appropriate to a building of scientific learning. Also, as a practice, Design Engine seeks to design low embodied energy and energy use buildings that can perform well and CLT helped to achieve this due to its high levels of airtightness and strong environmental qualities. “If only all schemes were designed to be unique in this way construction would be a lot more interesting.” Says Andy Goodwin, Managing Director at B&K Structures who installed the CLT at the school. “The vaulted ceiling design created in the laboratories by the complex roof geometry makes for a very cool space. The design combined with the use of visual grade CLT in the classrooms and communal areas has resulted in a stunning, high quality educational facility.” www.storaenso.com

IMAGES: 01-04. CLT is at the centre of a hugely successful hybrid construction project at the famous school. Courtesy Design Engine

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STA ASSURE Andrew Orriss said of his appointment: “Having been associated with the timber industry for many years, not least of all setting up UKSIP Association and Chairing in the early days, I am genuinely delighted to be joining the STA. Like any industry in these uncertain times there are challenges ahead but I truly believe drawing on my many years of experience in the industry, I can add value to the membership and the STA Assure accreditation programme. I look forward to meeting many of the members at the AGM on the 16th May.”

NEW SUPPORT FROM STA

01 The Structural Timber Association (STA) recently announced the appointment of Andrew Orriss in the new role of Director of STA Assure.

Working with STA members to develop the focus on technical excellence, Andrew will lead the development and implementation of the STA Assure Membership and Quality Standards Scheme and be responsible for building the profile of the programme and ensuring the continuing adoption of its values. “The appointment of a person with such illustrious experience is testament to the growing industry status of STA Assure, said STA Chief Executive Andrew Carpenter. “Thanks to market growth and the considerable technical investment into advancing structural timber, the industry is quickly expanding, and the demand for structural timber is on the rise. STA Assure has become a fundamental accreditation in the timber industry, and we are keen to integrate Andrew into our team. We are confident he will be an absolute asset to STA.

We are also delighted to announce that Pete Blunt, Managing Director of Innovare Systems and Board member of the STA, is assuming board responsibility for STA Assure. The knowledge and industry experience of the new STA Assure team will prove invaluable.” Former board member of the STA, Andrew has held senior sales and chairing roles with SIGD and UKSIPS. His hands-on experience in manufacturing business start-ups is paired with his experience in ‘zero carbon’ and sustainable construction matters. In his new role, he will also collaborate with industry stakeholders, define STA Assure standards for existing and emerging markets and promote the benefits of scheme to specifiers, industry stakeholders and customers.

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STA Assure, an independently audited scheme for STA members, was launched by the STA in 2017 to evidence quality and give confidence to consumers. As offsite technology is increasingly working towards resolving major construction challenges – particularly the shortage of UK homes – STA Assure has become a desired accreditation for innovative companies that are working to meet the increased demand for structural timber. In January 2019, the NHBC formally agreed to accept all STA Gold members as compliant with chapter 6.2 of NHBC’s assessment processes for timber structures without the need for further review or the completion of an HB2445 form. STA Assure has also received formal recognition from six other industry-leading structural warranty and building control bodies including LABC Warranty, Premier Guarantee, Protek Warranty, Build-Zone Warranty and ABC+ Warranty for STA Assure Silver and Gold members. Following extensive development and research into the accreditation system for structural timber, the STA won this year’s Health and Safety Offsite Award for their Site Safe policy, which is part of the STA Assure Scheme and provides members with processes to support customers in achieving safety during structural timber installations. For more information on the STA, STA Assure and Site Safe go to: www.structuraltimber.co.uk IMAGES: 01. Andrew Orriss, Director of STA Assure

BM TRADA

COMBATING THE CLIMATE given time to escape. Only then did the insulation, polythene vapour control layer and linings get installed in a dry environment. The timber would remain dry and deliver a good service life. As an increasing number of components are arriving at site premanufactured, there is more to consider than just the timber frame – insulation, membranes and linings are also getting wet – and that can be very bad news indeed, particularly when a structural timber frame is in there too. If timber moisture content is above 20% for a prolonged period, it risks decay, and if a wet structure is enclosed with no ventilation, it also risks mould growth on surfaces.

01 The UK is seeing a bigger push for offsite methods than ever before, but our unpredictable climate can cause problems with build quality. Robin Lancashire, Timber Frame Consultant at BM TRADA, considers the challenges and solutions to mixing building innovations with wet weather. Last year the NHBC published a report on modern methods of construction (MMC), which suggested that the majority of developers are now using innovative forms of construction, with much more being manufactured offsite. The drivers for using MMC are clear: increased efficiency and productivity, accelerated delivery, higher energy

performance and improved quality. With ever-increasing targets for housing, the Government is also putting pressure on developers to utilise offsite construction. While the use of offsite methods – and specifically timber frame – is the solution to achieving energy efficient buildings with much shorter lead times, the realities and practicalities of this kind of building must be considered. On paper offsite is unbeatable, but how practical is it in the real world with our beloved British weather? As more homes are being built using offsite methods, we’re receiving a significant rise in calls about the challenge of trapped moisture in timber frame buildings. Previously, open panel timber frames were erected over a number of weeks, often getting damp from the rain in the process. The roof covering would then go on and the timber frame would begin to dry again, because it was well ventilated and any moisture absorbed into the timber frame materials was

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If moisture damage occurs and drying out is needed, it counteracts the reasons for using offsite. Either the build programme is affected while the wet materials are dried or removed (which also increases costs) or the contractors plough on and hope for the best, negating the quality of the build and risking future structural failure if timber decay takes hold. The solution is a tricky one. Developers are being encouraged to manufacture as much as possible offsite, yet the reality when the components arrive onsite can be challenging. It’s crucial that everyone onsite knows how these materials should be handled so that moisture stops being an issue for current and future buildings. Although achieving the solution may have its hurdles, the basic message is simple – arrive just in time, lift straight into final position and carefully protect onsite. www.bmtrada.com IMAGES: 01. Wet CLT external wall panel, opened up for drying and monitoring using an electrical resistance moisture meter

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SOLID WOOD

THE WONDER OF TIMBER

01 The stunning, awardwinning new Cambridge Mosque, combines Islamic principles with European sensibilities. The timber structure will provide space for a prayer hall capable of accommodating 1,000 worshippers as well as a café and two apartments.

The newly constructed Cambridge Mosque’s main features are its gold-clad dome and the vast timber structure, which was designed and manufactured by Blumer-Lehmann AG in Gossau, Switzerland. The structure itself is a masterpiece of timber construction engineering. The use of timber complements the mosque’s sustainable construction concept, which incorporates solar energy generation and rainwater harvesting. In addition, the use of a natural material lends the building’s interior spaces a special atmosphere and vibrancy. The 30 free-form timber columns of the support structure soar upwards, merging with the lattice-like ceiling structure reminiscent of a ‘grove of trees’. The aim was to develop a British mosque for the 21st century. The local archetype was the chapel of King’s

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College, Cambridge, with its Gothic fan vault. Originally, the idea was to construct the chapel with masonry, but this would have meant that only the support beams would have been load-bearing and all ornamental work would have been purely decorative. For this reason, a wooden support structure was chosen, forming an ornamental pattern. Ultimately, the choice was made to use wood as the main building material as the clients explicitly focused on sustainability and advertised the building as an eco-mosque. The main structure consists of 30 free-form timber columns. In addition to those, the ceilings, the external and internal walls with a total area of 3,200sq m, the 2,000sq m roof, and three of the huge building’s staircases are constructed entirely from wood. The roof consists of a ribbed construction, while the internal and external walls are made from a timber frame structure.

SOLID WOOD

Cross laminated timber (CLT) is used for the external walls, part of the roof and ceilings. The impressive support structure consists of around 3,000 free-form components. Every individual element of the timber structure was produced at Blumer-Lehmann AG in Switzerland, using state of the art CNC-machinery and CAD-technology. Every single one of the 2,746 freeform pieces were prefabricated. In order to achieve the highest possible quality for all components, all six sides of each free-form component are milled. The walls and ceilings were also prefabricated. Finally, these 600 elements and the 2,746 free-form pieces had to be lined up onsite. The high degree of prefabrication in the factory and thus the production under optimal conditions allows exact cost calculation, ensures high quality, super precise components and reduces the rate of error. Onsite, the advantages of prefabrication are made evident through short assembly time which has a positive impact on overall project costs.

02 All forms of wood were used in the construction of the Cambridge Mosque. The highlight, the dome, is milled from laminated veneer lumber (LVL). The most striking is certainly the free-form structure, composed of single and double curved glulam beams, with the original timber coming from forests in Central Europe. The walls are designed as timber frames, the two apartments with CLT and the roof as a ribbed ceiling with alternating load-bearing directions.

www.blumer-lehmann.ch

IMAGES: 01. Timber engineering provides a stunning space for 1,000 worshippers, a cafĂŠ and two apartments. Courtesy Blumer-Lehmann AG 02. The complex lattice roof was fabricated offsite and craned into position.

TIMBER PERFORMANCE

THE EVOLUTION OF CLT Despite what has been written, changes in the Building Regulations do not ban engineered timber structures, they only restrict the use in the external wall elements over 18m, that is circa six-storeys. To put the changes in to perspective, we have constructed in excess of 50 CLT projects over the past 15 years, of which only three would have felt the impact of the regulatory change and a cost-neutral wall solution would have been simple to implement. The engineered timber sector by its very nature, is founded on innovation â&#x20AC;&#x201C; we are pioneers of sustainable construction and with modifications, B&K Structures will ensure building highly sustainable CLT structures over six-storeys is not only possible but also highly practical. Buildings are the sum of many parts and we need a full portfolio of materials to achieve the best outcomes in terms of safety, durability, efficiency, performance, cost and sustainability. B&K Structures are not engineered timber purists. Our business model focuses on hybrid construction solutions â&#x20AC;&#x201C; however, CLT is by far the most exciting revolutionary building material of the 21st century and will be significant in our future development plans.

01 Since the new Building Regulations came into force on 21 December 2018, much has been written about the use of cross laminated timber (CLT), with some commentators trying to whip up a storm. Others have taken a more pragmatic approach. Andy Goodwin, Managing Director, B&K Structures, explains how they have taken an innovative approach to embrace the new protocols.

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External Wall Solution for Structures Over 18m The restriction applies to the external walls of residential accommodation, care homes, hospitals and school dormitories over 18m. The rest of the building including internal walls, floors and roof can therefore be formed in CLT. This equates to approximately 80-90% of the overall structural frame. In anticipation of the government announcement, we have been working in close collaboration with our supply chain partners to develop alternative through-wall solutions that can be implemented with a primary CLT superstructure.

TIMBER PERFORMANCE

Our non-combustible unitised wall panel systems have been developed with leading industry supply chain partners. These systems replace CLT elements from within the external walls and external wall line, with a hot rolled structural steel carrier frame and non-combustible SFS infill wall panels. The remainder of the structural frame will be constructed in CLT, which is totally compliant with the regulatory changes. B&K Structures can offer added value to our unitised steel framing solutions with the addition of insulation and carrier boards to offer a closed wall system. This can include the inner plasterboard linings, mineral wool insulation fitted within the SFS system, and the external weather defence board. As part of the research and development of these compliant solutions, careful consideration has been given to the design interface between the CLT superstructure and the SFS walling system.

02 The SFS system and associated connection details have been designed to take in to account increased load cases attracted by traditional brickwork, heavier brick slip systems and balcony locations. We have been instrumental in the development and growth of the CLT market in the UK, and through continued collaboration with our supply chain and industry stakeholders, this will continue. The latest Building Regulations merely change the way we construct the external walls to residential schemes above 18m. We will continue to work with our clients to ensure that any new projects are designed and delivered in accordance with the new Building Regulations. Over the last 10 years CLT has been emerging as a sustainable and costeffective building material of choice and a vital component in the battle to reduce carbon emissions in the construction sector. We must consider the specification of materials when constructing large scale developments to ensure we minimise the impact on the environments, not just for us but for the health and wellbeing of generations to come.

Only now are we truly realising the full capabilities of this strong, sustainable and technically advanced structural solution and the new regulations will not stifle innovation. The UK has a magnificent heritage of timber architecture dating back to the thirteenth century â&#x20AC;&#x201C; we are now building on this legacy using groundbreaking engineered timber systems. We develop high quality, low carbon projects for a wide range of clients throughout the UK and through our robust, integrated supply-chain, we are dedicated to finding the best solution. Operating since 1974, B&K Structures has worked with some of the UKâ&#x20AC;&#x2122;s renowned clients to develop outstanding buildings with green credentials. For more information on their product portfolio and full range of services go to: www.bkstructures.co.uk

IMAGES: 01-04. CLT has emerged as a sustainable and cost effective building material and a vital component in the battle to reduce carbon emissions in the construction sector. Images courtesy (1) Hawkins/Brown and Jack Hobhouse, (2) Simon Kennedy, (3) Waugh Thistleton and (4) B&K Structures

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TIMBER PERFORMANCE

COMBUSTIBLES’ LEGISLATION: AN INFORMED POLICY FOR TIMBER CONSTRUCTION?

01 Following the government’s decision to restrict the use of combustible materials in the external walls of new buildings over 18m tall, Jeremy English, Sales Director at Södra Wood, considers the impact of the legislation and the immediate and longerterm implications to the construction sector.

At the end of 2018, as part of fire safety improvement measures intended to prevent another tragic blaze like that seen at Grenfell Tower, Housing Secretary James Brokenshire introduced new legislation. As well as addressing issues around cladding, the Ministry of Housing Communities and Local Government announced new Building Regulations restricting the use of combustible materials in the external walls of new buildings and specified attachments with a storey above 18m in height. The restrictions, which include residential blocks of flats, student accommodation, care homes, sheltered housing, hospitals and dormitories in boarding schools, have been in force since 21 December

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2018. The amendments now require that all materials which become part of an external wall or specified attachment achieve European Class A2 or Class A1 fire resistance. Although timber played no part in the fire performance failings seen at Grenfell, this sweeping change has profound implications across the construction sector. Architects, builders and suppliers of timber and engineered timber products such as Södra Wood are now looking at what the future holds for mass timber builds – and, in particular, the specification and use of cross-laminated timber (CLT) as a strong, lightweight structural component for multi-floor structures.

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TIMBER PERFORMANCE

With over 500 buildings already constructed using CLT technology over the last 15 years, the UK has become a world-leading adopter. In an impact assessment, even the government admits that the scope of the ban will affect CLT and “will likely slow down the use of engineered timber in future developments over the medium to long-term.” There is no question the restrictions are intended to enhance occupant safety. But they also have some far-reaching effects. CLT-engineered systems, for instance, maintain predictable structural integrity in a fire. They can offer occupants vital time to evacuate a structure, and for emergency services to fight the blaze. Since first introduced into the UK in 2004, CLT has become an increasingly popular choice for structural components. Manufactured offsite in fully-controlled factory conditions, CLT construction has the potential to significantly reduce build times. It is easy to transport and modify, minimises noise pollution on site and is highly cost-efficient to produce and use. Crucially, timber is a natural renewable product and CLT offers planet-saving environmental carbon capture benefits. Climate-change studies show that timber construction reduces greenhouse gas emissions by around 50% compared with concrete structures. Given these far-reaching benefits, it’s hardly surprising that some prominent industry players are questioning the scope of the changes, and highlighting some unintended consequences. One of the leading proponents of CLT construction in the UK, Waugh Thistleton Architects, has commented that the government statement demonstrated a “misunderstanding” of the fire performance of engineered timber and had “overreached its stated aim” of fire safety improvements following the Grenfell disaster. The legislation cites the catch-all term of ‘combustible’ materials. However, it’s important to remember that, when subjected to sufficient energy and oxygen, most things will burn.

Moreover, when a construction material is labelled ‘combustible’, this tells us nothing about how it will perform in a building fire. A wealth of factors will dictate this, including the design of the structure and how the system is engineered and constructed.

It goes without saying that all of us welcome any change that could reduce the likelihood of fire and potential loss of life in any building. But, like others, I am concerned that decisions should always be evidence-based, using the most accurate real-world testing available. It is not wise to simply adopt systems that are perceived as being made from non-combustible materials when we do not have proven performance characteristics available from testing in the event of fire. There are also other issues to consider such as the chimney effect, which can see fire spreading rapidly even in noncombustible structures.

Structural timber and CLT products have very predictable charring rates. When exposed to fire, the load-bearing core of a beam or truss will remain intact while the char layer remains to protect it. The char forms an insulating layer preventing an excessive rise in temperature within the unburnt core. The core continues to function, providing a predictable period of fire resistance. By specifying an appropriate cross-section and number of timber-ply layers, designers can ensure a structural timber member is sufficiently sized to allow for the loss of timber through charring, and so retain structural integrity for defined periods in a blaze. In terms of posing a fire risk, buildings can be vulnerable during construction unless they have been adequately assessed with mitigating measures taken. Since most mass timber construction does not call for hot work or grinding, a major ignition source is completely removed. In the case of newbuilds which adjoin other pre-existing properties, the timber of the adjoining wall is typically treated with an intumescent fire retardant, allowing time for any blaze to be safely extinguished before it can take hold of a property. Södra, for example, offers timber products treated with Protim Frameguard®. Once surrounded by non-flammable materials like bricks, blocks and plasterboard, the combustion risk for a timber frame is limited.

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In the past, initiatives such as the Timber Frame 2000 project have provided valuable data about the performance of timber frame construction, in particular fire safety performance and resistance to collapse. Presently, the Structural Timber Association, amongst others, is currently augmenting its already extensive fire-resistance testing data. Further investigation will determine how the in-situ fire resistance characteristics of structural timber systems can be best exploited in modern high performance buildings. Its findings are expected later this year. Once they arrive, I believe that we should then have an informed review of regulations. www.sodra.uk

IMAGES: 01. Jeremy English, Sales Director at Södra Wood 02-03. CLT systems maintain predictable structural integrity in a fire and have very predictable charring rates

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MODIFIED WOOD

A CHANGE IN TIMBER HABITS

01 One rapid growth area for the timber specifier are the options available in modified wood products. These have become popular across a range of construction applications ranging from cladding and decking to new joinery options.

02 What is wood modification? Modified wood can be defined as wood which has been treated chemically or physically to enhance its performance. The application of chemical, thermal and impregnation technologies to affect the cell structure of wood, aims to improve the performance of the wood, most notably dimensional stability and decay resistance. Additional benefits include consistency of weathering, performance of coatings and thermal efficiency. For the most part, wood modification is used to change fastgrown, non-durable and unstable wood into high performing wood products that can compete with traditional oldgrowth temperate and tropical timber species. The market for modified timber in the UK is currently a dynamic one and currently favoured in the joinery, cladding and decking markets. Due to the loss of structural properties during modification (particularly thermal) and cost, these products are not often being used for structural applications – although this is changing with solid glulam Accoya being increasingly seen –

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but the mainstays of the modified wood market include: • Accoya – joinery and some cladding • Kebony – decking and cladding • Thermowood, Abodo – cladding and decking • Brimstone, Thermory, Novawood and other thermally modified hardwoods – cladding and decking • Lignia – yacht decking (and relatively new on the market). There are many drivers behind the growth of modification. The increasing demand for wood has put pressure on traditional timber resources – particularly from Asia – and European chemical regulations has reduced the efficacy of chemically treated wood. Interestingly, wood modification has struggled to get a foothold in the USA where chemical regulations are well behind those in Europe. The ability to use fast growing/ plantation grown wood species, in the 25–50 year range, rather than a mature tree 200+ years old has created huge interest – especially in China where the main source of wood is plantation grown.

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We use intense heat to reconfigure traditional British hardwoods. No chemicals. Nothing nasty. Just a more durable, stable and consistent material for decking, cladding and joinery.

Transforming British Woods By using British species, weâ&#x20AC;&#x2122;re increasing the demand for native broadleaf woodlands. This supports local species and rural jobs, while reducing the environmental impact of global transportation. For product advice and sales contact Vastern Timber 01793 853 281 sales@vastern.co.uk www.brimstonewood.co.uk

Transforming British Woods

MODIFIED WOOD

In all cases it is still wood and not a plastic composite, so when used externally it will lose its colour, it may crack a bit and there will be some variation. However, the macro drivers dictate that modified wood is here to stay. Significant new technologies continue to appear, such as the new Lignia product and current technologies will be enhanced and improved. We will undoubtedly see copy-cat technologies and maybe some new methods originating from China, followed by huge volumes of material. Technologies will be tweaked to reduce disadvantages such as brittleness and new add-on technologies will be created to further enhance performance and aesthetics. It is also likely that treatment plants of all types will continue to appear and in many cases nearer the raw material, reducing the financial and environmental impact of transportation.

04 Importantly, there are large scale R&D investment opportunities to develop technologies to use homegrown wood. Brimstone was created to use locally grown British hardwoods, thermal modification developed in Scandinavia has improved the performance of locally grown pine and spruce, and Abodo was developed in New Zealand to use locally grown radiata pine. All

of these developments tap into the desire to reduce consumption of old growth species including valuable and threatened tropical species. The future of modified wood is healthy â&#x20AC;&#x201C; although not a silver bullet. In all its forms it has many advantages but there are also a few disadvantages when compared to natural timber.

STRUCTURALTIMBERMAGAZINE.CO.UK

To reap the full benefits of modified wood technology and boost its profile, the architectural and design community need to improve its understanding about these products and the applications to which they are best suited. Certainly the implementation of a third-party accredited testing regime to give the necessary assurances about the efficacy of different modification technologies, to underpin confidence in what are relatively new products is required â&#x20AC;&#x201C; and is something the Wood Protection Association is already consulting on. www.accoya.com www.brimstonewood.co.uk www.growninbritain.org www.kebony.com/en IMAGES: 01-02. 1000sq m of Brimstone poplar plus solar shading fins, Oxford. Courtesy Vastern Timber 03. The Ivy in the Park, London. Courtesy Accoya/Ben Pipe 04. The Point, Polzeath, Courtesy Kebony

CNC MACHINING CENTRES FOR TIMBER CONSTRUCTION

SCM is able to provide high technological cnc machining centres for the construction industry. Structural beams and modular elements of wooden walls are produced with extreme accuracy and rapidity thanks to Oikos and Area. The innovative structure with 6-axis architecture allows any machining operation on all faces without revolving or repositioning the workpiece. SCM Maestro Beam&Wall software permits easy interface with most CAD programs used by customers, thanks to the import of BTL files, the most common format used in timber construction.

SCM UK Tel. +44 (0)115 9770044 - scmgroupuk@scmgroup.com - www.scmgroup.com

SIPS

A HEALTHIER MODEL FOR DESIGN AND DELIVERY The first phase of construction, which included the main school building, was handed over early, allowing the school to open on time for gatherings at the start of the school term. During construction, Morgan Sindall Construction & Infrastructure partnered with sister company BakerHicks, the multidisciplinary design and engineering company, to utilise Microsoft’s Hololens mixed reality headset to perform installation checks.

With offsite technology now essential to streamlining performance, more and more UK contractors are opting to integrate timber systems alongside the wider use of BIM. One of the UK’s major contractors – Morgan Sindall – is now using a variety of offsite technologies but has long been a proponent of SIPS. “Construction may have been slow to adopt new technology but the advance of offsite manufacturing means that the pace of innovation is finally accelerating,” says David Rowsell, Area Director for Northern Home Counties, Morgan Sindall Construction & Infrastructure. “Advanced manufacturing, automation, big data, and artificial intelligence are all transforming the way we work – with new modes of working enabled by technology shaping our world and creating new futuristic industry landscapes. Although the construction industry hasn’t always been the fastest adopter of new technologies, the advance of offsite methods of construction is one area where we can

clearly see the sector beginning to evolve and adopt new ways of working that maximise the efficiencies presented by technology and open out new avenues for delivery. “Operating in a controlled, indoor environment enables a more stabilised and efficient process, which enhances the potential for driving efficiencies and creating enhanced methods of delivery. We’ve witnessed this first-hand at a number of projects we’ve delivered which use offsite construction methods to great effect, including Ashmole Primary School.” Ashmole Primary School in Southgate, London, is a new £7.5million facility delivered for the Education & Skills Funding Agency (ESFA) via the Southern Construction Framework (SCF). Delivered by Morgan Sindall Construction & Infrastructure, the school is part of the latest phase in a government-backed scheme which will see the creation of 49 new free schools across the country. Offsite construction was central to the delivery of the new school building. Morgan Sindall Construction & Infrastructure’s team was able to reduce the traditional frame build by five weeks. This included using elements such as SIPS and enabled the frame, intermediate floor and roof to be delivered in stages.

STRUCTURALTIMBERMAGAZINE.CO.UK

This meant that the team was able to project their live construction BIM model onto the mechanical, electrical and public health (MEPH) installations on the site. A customised app was also developed, enabling the team to view and interrogate a section of the project’s MEPH. “Our project team installed a number of modular elements including structural insulated panels (SIPS),” adds David Rowsell. “Whilst the full design of the whole frame, intermediate floor and roof was completed and federated before manufacture and was constructed offsite and delivered to site in stages. “Using offsite construction methods at Ashmole has delivered multiple benefits including reducing the traditional frame build by five weeks due to the use of SIPS. We’re incredibly excited about the potential that offsite solutions and new technology presents to enable the industry to evolve and incorporate new technologies and processes which boost innovation and drive efficiencies across the sector.” www.construction.morgansindall.com

IMAGES: 01. Ashmole Primary School used SIPS to deliver a new school five weeks earlier than using traditional methods

2019

31.05.2019 SOCIAL HOUSING PROJECT OF THE YEAR

PRIVATE HOUSING PROJECT OF THE YEAR

PRODUCT INNOVATION AWARD

EDUCATION PROJECT OF THE YEAR

CLIENT OF THE YEAR

HEALTHCARE PROJECT OF THE YEAR

ARCHITECT OF THE YEAR

COMMERCIAL PROJECT OF THE YEAR

CONTRACTOR OF THE YEAR

RETAIL & LEISURE PROJECT OF THE YEAR

ENGINEER OF THE YEAR

LOW ENERGY CUSTOM & SELF BUILD PROJECT OF THE YEAR PROJECT OF THE YEAR

PROJECT OF THE YEAR

EVENT DATE 09.10.2019 Book your sponsorship package now call: 01743 290001

PIONEER OF THE YEAR

INSTALLER OF THE YEAR

PROJECT OR CONSTRUCTION MANAGER OF THE YEAR

PRODUCT WARRANTY

UNDERSTANDING CLT John Gilbert, Premier Guarantee Technical Standards Manager, provides technical guidance on the treatment of cross laminated timber (CLT) and its structural use. A number of CLT products have thirdparty product approval for the use as a structural plank for construction use. However, it is also important that manufacturers have a quality management process to ensure consistent quality. Usually these approvals and manufacturing processes are for the solid plank and therefore full designs of the construction including its external cladding are required on a site-by-site basis. CLT as a structural timber product isn’t preservative treated. It is also difficult to ‘post treat’ the panels due to the compact layers of softwood timber making penetration of the preservative across the full cross section difficult to achieve. So, it is important that the design keeps the CLT panel completely dry, particularly at ground level and around critical junctions. Where structural timber, such as these wall panels are to be used in an external wall construction consideration should be given whether timber treatment is necessary if the species of the timber isn’t sufficiently naturally durable. The vulnerability of timber in external walls is particularly critical where the timber is positioned in certain areas including at the horizontal damp proof course without the inclusion of a treated sole plate. Premier Guarantee are actively involved with the Structural Timber Association (STA) and have recently supported and endorsed technical guidance produced by the STA. The recently reviewed CLT guidance is available at: www.structuraltimber.co.uk www.bmtrada.co.uk For more information on CLT Technology why not attend:

www.solidwoodsolutions.co.uk

FOR OUR WARRANTY PURPOSES Where projects are proposed that incorporate CLT wall panels, they must not be used with a render or other cladding system that is directly bonded to the wall panel. A drained and vented cavity must be provided. The CLT panel must be suitably protected as follows:

At DPC level

The CLT wall panels can be positioned directly onto the horizontal DPC (over the substructure walls) without a treated timber sole plate providing that: • The DPC extends at least 50mm past the face of the CLT and in the case of the cavity wall side -extends down 50mm below the horizontal DPC without bridging the cavity • The lowest level of the CLT panel where it sits onto the horizontal DPC must be not less than 150mm above the finished ground level. The residual cavity must extend 225mm below the lowest horizontal DPC level • Open brick perpends/weeps should be sited under the external horizontal DPC in the cladding at 1200mm centres • Measures to prevent cold bridging at the substructure wall/ground floor CLT wall panel junctions must be in place • Ground levels immediately in front of the external wall should slope away from the building cladding • CLT panels must not be constructed into ‘troughs or pockets’ e.g. for an internal wall panel on a structural slab. The risk of hidden damage from accidental water leaks could lead to moisture collecting around the panel.

Above Horizontal DPC level

• All exposed end grain to the wall panel must be suitably treated (e.g. end grain edges of the panel or where holes are cut through the panel to form openings – windows, doors, flues etc.) The end grain sealant should extend 50mm onto the panel sides • There must be a drained and vented cavity with a minimum 50mm residual cavity retained • The external wall insulation must be a ‘breathable’ type insulation and directly fixed to the CLT wall panel • An approved breathable membrane must be installed to protect the insulation on the cavity side • Suitable approved wall ties must be used which are secured to the CLT panel • The CLT panels should be protected on the ‘warm side’ by a suitable vapour control layer (VCL) unless interstitial condensation risk analysis calculations prove that the risk of interstitial condensation will not occur within the construction • The structural engineer must provide details of suitable mechanical fixings to secure the CLT panels to the substructure.

STRUCTURALTIMBERMAGAZINE.CO.UK

ARE YOUR PRODUCTS AND SYSTEMS APPROVED? As part of our warranty application process, developers and builders must ensure that the products and systems they use on site are approved by us in line with the requirements of our Technical Manual. Using products and systems that are not approved by Premier Guarantee may lead to lengthy delays on-site and could result in the development being rejected for structural warranty cover. Our product and system approval process has been developed to help manufacturers gain accreditation under our technical requirements, allowing them to be promoted as an approved system provider, giving customer’s confidence in using their products and systems on sites registered with Premier Guarantee.

construction, giving developers and lenders the confidence and trust in your product. As a leading provider of Structural Warranty in the UK, being approved by Premier Guarantee would: • Enable your product to be approved for use to over 2000 Premier Guarantee registered Developers and Builders throughout the UK.

BENEFITS OF BEING APPROVED

• Provide assurance to our clients and lenders that your products and systems are approved to perform to a consistently high quality standard and remain durable for a minimum of 60 years.

Our approval process is one of the most robust in the Structural Warranty market. It audits manufacturers on design, quality control, assembly, transportation and on-site

• Allows you to promote yourself as an approved system provider giving your customers the confidence to use your products and/or systems.

premierguarantee.co.uk | 0800 107 8446 2 Shore Lines Building, Shore Road, Birkenhead, Wirral, CH41 1AU @PG_Live

/ premier-guarantee

MD Insurance Services Ltd is the Scheme Administrator for the Premier Guarantee range of structural warranties. MD Insurance Services Ltd is authorised and regulated by the Financial Conduct Authority.

WOOD WINDOW ALLIANCE

RETHINKING WOODEN WINDOWS

01 Tony Pell, Chairman of the Wood Window Alliance (WWA) outlines several reasons why natural materials are the best way forward for window design and installation. Wood has been the natural choice for windows and doors for centuries. However, over the last few decades, housebuilders have chosen to install PVC-U windows over wood windows as it was perceived that they provide a longer life. This has often resulted in properties scarred with stark out-ofplace PVC-U windows. Having worked in the timber industry for 20 years, I’ve witnessed significant advancements in technology and manufacturing which has driven the use of timber across a variety of projects, from social housing to healthcare and education. The world’s oldest and most traditional building material is being increasingly revaluated as a modern-day first choice. Independent research by Heriot Watt University looked at a typical wooden window made to WWA standards and found that the window had an expected service life of 60 years – double that

of a PVCu window at 30 years. This provides those who favour timber for construction purposes with a wonderful opportunity to share the truth: wooden windows actually provide longevity far beyond what plastic can hope to. Maintenance, too, is easier than many believe. When made to WWA standards, factory-finished windows come with a supplier-backed coating guarantee – typically 10 years for paint and seven years for stain coatings, dependent on exposure. Overall, there is a growing appetite for natural materials – homeowners especially don’t want their houses to contribute to global warming and would much rather see their home built with timber sourced from sustainable forests, where more trees get planted than harvested.

STRUCTURALTIMBERMAGAZINE.CO.UK

Our research shows British homeowners perceive timber windows as the most environmentally friendly (44%), most aesthetically pleasing (44%), the nicest to live with (33%) and providing the most character (56%). This is why wood windows made to WWA standard have negative Global Warming Potential over their estimated 60 year life service, with each frame saving 160kg CO2 over its estimated lifecycle compared to a PVCu equivalent. Additionally, all WWA members hold either FSC® or PEFC™ chain of custody certification to show how they source timber from sustainably managed forests. Wooden windows are suitable for all sorts of buildings – another misconception worth highlighting, as many associate natural windows with older properties. WWA members get involved in all types of project – from sympathetic replacement of original windows in listed properties through to contemporary designs with slim sightlines and triple glazing. Choosing wood for windows is also an energy efficient choice. WWA members design and manufacture their windows to ensure they not only meet but surpass industry performance requirements relating to weather tightness, operation and strength. At the WWA, we believe wooden windows are the future, so we champion the beauty, efficiency and durability of wood window frames. Our members manufacture a myriad of styles – from contemporary to traditional – that meet the most demanding standards of quality, performance and sustainability. As a renewable, eco-friendly material coupled with modern manufacturing, wood is proving to be the catalyst for architecture and construction professionals in creating spaces that promote lower carbon emissions, longevity, beauty and a real connection to nature. Founded and managed by its members, The Wood Window Alliance is the benchmark for the industry, providing the reassurance of high quality, performance and sustainability standards. To find a supplier you can trust, visit: www.woodwindowalliance.com or find us on Twitter @woodwindowall IMAGES: 01. The Rex Building. Courtesy George Barnsdale

Itâ&#x20AC;&#x2122;s all about confidence Tried, tested and trusted fire protection for construction timbers

Dricon Specification website visit lonzafiretreatments.eu

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FIRE RETARDANT INT2 Humidity Resistant type TREATEDfor TIMBER fire retardant permanent interior applications

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PRODUCT DESIGN

ITW CONSTRUCTION PRODUCTS SAVES TIMBER GABLES ON MASONRY WALLS

01 Trudi Stewart, Marketing Manager at ITW Construction Products, explains the collaborative approach they took with industry stakeholders to revolutionise construction design and installation methods. The result is an innovative solution the whole industry can adopt with confidence.

The ability to satisfy the industry’s needs by making construction partners part of the product development process is central to ITW Construction Products customer-backed innovation culture. The Cullen brand of timber engineering connectors has been synonymous with innovation and quality for over 40 years. When the industry had an issue with the design and installation of timber gable panels to masonry wall construction, our R&D engineering experts were approached in the first instance to problem solve and create a compliant, reliable solution acceptable to all in the value chain. In collaboration with NHBC, national housebuilders, Trussed Rafter Association (TRA) and industry partners our skilled professionals understood

the key needs and challenges facing the industry. Armed with this deep knowledge and understanding a gable restraint system, featuring the innovative Cullen Gable Restraint Bracket was created. This provides a verified connection between timber gable panels to masonry walls. The details have been developed to safely transfer lateral wind load on the masonry and timber gable ends into the braced roof diaphragm. We were delighted to receive a letter from NHBC stating “We can confirm NHBC’s acceptance for use of the Cullen Gable Restraint Bracket on NHBC sites.” The ITW system meets their technical requirements and delivers a robust structural fixing for timber gable wall panels to masonry wall construction.

STRUCTURALTIMBERMAGAZINE.CO.UK

02 We partnered with national housebuilders throughout the development process including joint site trials. Endorsing the system and its development Michael Finn, Group Design & Technical Director with Barratt Developments Plc comments: “At Barratt Developments we are continually looking at ways to improve our building standards through improved installation methods and the use of innovative building products are crucial. We’ve been working with ITW Construction Products’ R&D team during development of their innovative gable restraint system to ensure all relevant performance criteria are satisfied. “For us a compliant and easy to fit solution is essential. ITW Construction Product’s new gable restraint system has NHBC acceptance and is simple to install on site. To aid site teams and NHBC, ITW Construction Products has created a complete solution for the design, installation and inspection of timber gables to masonry wall construction and we are already switching our designs to this innovative system.” At ITW Construction Products we know that a collaborative approach is crucial if we are to find new revolutionary ways of solving problems facing the industry today. We are delighted to have valueengineered a trustworthy system that is being speedily adopted by the value chain. You can rely on the experts at ITW Construction Products to continue supporting the sector to find solutions whenever there are challenges. www.itwcp-offsite.co.uk

IMAGES: 01. Scott McAndrew, R&D Manager at ITW Construction Products, explaining the benefits of the Cullen Gable Restraint Bracket at the TRA AGM. 02. Gable Restraint Bracket. Patent Pending

TIMBER FRAME The three main blocks have been carefully arranged, making the most of available space. The buildings step up the slope, with flats arranged over a total of six levels. Raining’s Stairs was built on a particularly difficult site. The critical issues were the steep slope and limited access. The low part of the site is enclosed by buildings, and access on the high side is very limited. The significant changes in level (27m) and narrow nature of the site posed several challenges. The site is sloping and has no storage and very narrow access, making delivery of materials challenging as delivery times and dates were limited to ensure there was no impact on the surrounding traffic and car park.

OFFSITE STEPS UP

02 The Raining’s Stairs development provides high-quality social housing which has helped transform a long-vacant site in Inverness city centre and could only be made viable by using offsite timber technology.

The Raining’s Stairs housing project was completed in October 2018 and has been transformational. It is named after the adjacent Raining’s Stairs, which connect the city centre to the Crown area and was built by a partnership between the Highland Housing Alliance, the Highland Council, developer Ark Estates, William Gray Construction Ltd and Trail Architects with a full timber kit supplied by Scotframe Timber Engineering Ltd. The project received funding from the Scottish Government as part of the City Region Deal. It comprises five one-bedroom and eleven two-bedroom flats, a 70sq m commercial unit, and cycle and refuse storage. Six flats are for affordable rent from The Highland Council and ten flats are at a mid-market rent from the Highland Housing Alliance. The designs take into account the historic character of the area. The buildings have traditional pitched roof forms, so sit comfortably alongside neighbouring buildings, but the materials and detailing are contemporary. The use of lightweight materials in the cladding of walls and roofs creates a sharp, attractive façade which was also quick to install. The process was simplified further by installing window elements within the wall panels in the factory – reducing construction time and improving the building envelope, especially in relation to thermal performance.

STRUCTURALTIMBERMAGAZINE.CO.UK

Using an offsite structural timber kit allowed the project team to simplify the construction programme onsite, therefore addressing these challenges successfully and delivering the project on budget and ahead of schedule. Terraces were created to carry low level steel platforms, meaning that the prefabricated timber superstructure could simply be delivered and installed in place on these platforms. The project used factory assembled timber floor cassettes and pre-insulated timber kit wall panels, with windows factory fitted in the panels by Scotframe Timber Engineering Ltd before delivery. This significantly improved the thermal performance of the buildings, reduced insulation waste and also removed the requirement to store windows, doors and insulation onsite. The closed panels used in this project provide a U-Value of 0.17 W/m2K through the finished wall structure. Pre-assembled floor cassettes (with a 15mm OSB deck factory fitted to provide a safe working platform) were also craned into place. The top floor wall panels followed, and finally the timber roof trusses. The build programme for the project was planned to be 60 weeks, but it was completed and handed over in 52 weeks – an eightweek saving in time along with all the associated savings in labour. www.scotframe.co.uk

IMAGES: 01-02. The steep sloping site was successfully overcome using offsite timber technology. Courtesy Scotframe

FFSITE

EXP

RICOH ARENA - COVENTRY CONSTRUCTION

TECHNOLOGY

INNOVATION

BE PART OF THE MOST DYNAMIC OFFSITE EVENT OF THE YEAR! With the shift away from ‘traditional construction thinking’ to the adoption of assembly principles – offsite construction techniques and technologies are shaping the future of the built environment.

NEW FOR 2019 - OFFSITE EXPO brings together those who are driving change in the construction sector – the event will play host to the leading UK and international offsite manufacturers and component suppliers showcasing a broad spectrum of panelised and volumetric modular systems, plus pod and prefabricated MEP solutions. BOOK YOUR EXHIBITION SPACE NOW!

For more information contact julie.williams@radar-communications.co.uk

WWW.OFFSITE-EXPO.CO.UK IN PARTERSHIP WITH:

HOUSING

DRIVING CHANGE AND PROMOTING INNOVATION IN THE CONSTRUCTION SECTOR 3,000 DELEGATES 100 INDUSTRY BUYERS 97 SPEAKERS The offsite arena is an exciting place to be. The levels of investment and confidence in the longterm viability of advanced offsite methods of construction, is greater than previously witnessed. The Government’s presumption in favour of offsite construction for all public sector building projects, underpinned by consistent and joined-up messages – marks a major change in the political landscape. Much has been written about the benefits of offsite technologies and the impact these progressive building methods will have on the construction industry but taking the build process into controlled factory conditions has far reaching implications and requires a change of mindset and approach. Taking place at the Ricoh Arena, Coventry on 24 and 25 September 2019 – Offsite Expo is designed to support this transition. The brainchild of leading industry experts who understand the urgent need for a dedicated event which showcases international offsite best practice, maximises knowledge sharing and facilitates collaboration opportunities to move the offsite industry forward at a faster pace. Driving change and promoting innovation in the sector – Offsite Expo has been created to shine a spotlight on sector developments and outline the business opportunities that lie within factory-based manufacturing technology. Through high profile speakers and masterclasses, the conference will challenge outmoded ideas and showcase new techniques which are revolutionising the way buildings are designed and assembled.

WWW.OFFSITE-EXPO.CO.UK

SPEAKERS IN THE SPOTLIGHT Here is just a snapshot of the expert conference presenters: Andrew Way Associate Director, SCI With over 20 years’ experience in light gauge steel construction and product assessment, Andrew is the UK representative on the European project team responsible for the evolution of EN 1993-1-3.

Ben Drake Associate Structural Engineer, Peter Dann Ben directs a skilled team of structural engineers who deliver high-end volumetric modular projects in the UK, US and Canada. With 10 years’ experience in structural and seismic design in complex buildings worldwide, Ben offers a global perspective.

David Clark Manufacturing Director, The McAvoy Group Leading the McAvoy Group to win the BIM Contractor of the Year Award, David manages the expansion of productivity through automation and digital solutions.

Elaine Toogood Senior Architect, The Concrete Centre Elaine contributes to high-profile concrete magazines and publications, guest lectures at several universities, crafts her own events, chairs RIBA South East London and is involved in major architecture groups.

FFSITE

EXP

RICOH ARENA - COVENTRY CONSTRUCTION

BE PART OF THE MOST DYNAMIC OFFSITE EVENT OF THE YEAR! Open to organisations and businesses who would like to maximise their business presence and align their products and service with this increasingly important sector, Offsite Expo has a range of exhibitions and sponsorship packages. These have been designed to be flexible and offer a wide range of promotional opportunities to suit any marketing aims, resources and budget. Exhibitors will also benefit from the exclusive opportunity to participate in the Offsite Connect Buyers and Specifiers Forum. Offsite Expo organisers recognise the need to improve productivity during offsite processes, acknowledging that construction clients need to develop stronger connections with manufacturers to facilitate design for manufacture and assembly (DfMA) as early as possible in the design process. Offsite Expo will provide the forum for this early engagement, which will be attended by 100 invited buyers and specifiers. Structured to maximise business opportunities, the forum offers a highly effective platform for buyers to meet with offsite supply chains who share their transactional aims. This dynamic environment is designed for exhibitors to meet architects, contractors, specifiers and purchasing managers who are seeking the latest innovations.

TECHNOLOGY

INNOVATION

THE OFFSITE EVENT OF THE YEAR With the shift away from ‘traditional construction thinking’ to the adoption of assembly principles – offsite construction techniques and technologies are shaping the future of the built environment. Offsite Expo is set to become the pivotal event in this rapidly expanding and fast-moving sector. Geared towards creating a dynamic forum for businesses to showcase offsite solutions and the latest smart digital construction technologies. Offsite Expo is the place for people to engage with key industry contacts, acquire new knowledge and network in vibrant surroundings.

The event will take place on 24-25 September 2019 at the Ricoh Arena, Coventry. The venue is easily accessible for all exhibitors, with 2,000 free car parking spaces, onsite hotel, discounted local hotels and local train/airport links. INDUSTRY MEDIA PARTNERS:

HOUSING

GOLDEN OPPORTUNITY – ALIGN YOUR PRODUCTS AND SERVICES WITH THIS INCREASINGLY IMPORTANT SECTOR Offsite Expo sponsorship and exhibition packages offer ultimate flexibility, with numerous promotional benefits to suit marketing aims, resources and budgets. Attracting exceptional interest – these are the only sponsorship opportunities remaining:

SPONSORSHIP PACKAGES Sponsor the visitor guides - £5,000 Your company name will be printed on the front cover, spine and footer of every page of 3,500 full-colour guides that detail the exhibitions and seminars. You will also be allocated a full-page advert.

Sponsor the show guide bookmarks - £1,500 Profile your company on the pages of the visitor guides with 3,500 branded bookmarks.

Sponsor the floorplan - £500 We will print your logo on the fold-out floorplan that visitors will use throughout the event as they navigate between exhibitions, masterclasses and seminars.

Sponsor the media centre - £5,000 Your company name will be at the heart of the show amid the high footfall of the press office and sales lounge. Sponsor the VIP lounge - £5,000 Your brand will be seen by the most influential leaders in the exclusive VIP lounge, which you can brand and manage independently.

Alternatively, combine your exhibition space with a sponsorship package to maximise your return and raise your profile amongst an audience of high-profile construction professionals. GOLD SPONSOR 36sqm stand space + numerous major benefits £15,000

SILVER SPONSOR 24sqm stand space + major benefits £10,000

BRONZE PLUS SPONSOR

Sponsor the Buyers and Specifiers Forum - £15,000

18sqm stand space + major benefits

Highlight your brand in the prime business zone for

£7,750

architects, specifiers and purchasing managers, who will be selecting innovative systems for upcoming

BRONZE SPONSOR

projects.

12sqm stand space + major benefits

Sponsor the registration area - £5,000

£5,750

Make the first impression with your brand at the centre of our electronic sign-in system.

Sponsor the masterclass seminar £2,000/£5,000 Be a prominent force in the theatres that hold our audience captive.

TO LEARN MORE OR BOOK YOUR EXHIBITION AND SPONSORSHIP PACKAGES: Contact julie.williams@radar-communications.co.uk or call 01743 290042

Sponsor the offsite café - £7,500 Make brand impact by sponsoring the dining areas with branded cups, menus and serving area fascia.

WWW.OFFSITE-EXPO.CO.UK

The world leader in timber preservation technology ®

Protim

Celcure

Aquatan

FirePro

Fire-X

DELIVERING HIGH QUALITY TIMBER SOLUTIONS FOR DECADES FOR MORE INFORMATION

Visit: www.kopperspc.eu Email: kpc@koppers.eu Call: +44 (0)1628 486644 Fax: +44 (0)1628 476757 Protim Solignum Limited, Fieldhouse Lane Marlow, Buckinghamshire SL7 1LS ™ Protim Solignum Limited trading as Koppers Performance Chemicals. Koppers is a registered Trademark of Koppers Delaware, Inc. Whilst every attempt has been made to ensure the accuracy and reliability of the information contained in this document, Protim Solignum Limited gives no undertaking to that effect and no responsibility can be accepted for reliance on this information. Information will be updated when the need arises. Please ensure you have an up to date copy. All products are produced by independently owned and operated wood processing facilities. All other trademarks are trademarks of their respective owners. Koppers Performance Chemicals, Protim Solignum Limited, Fieldhouse Lane, Marlow, Buckinghamshire, SL7 1LS. Visit: www.kopperspc.eu, Email: kpc@koppers.eu, Call: +44 (0)1628 486644, Fax: +44 (0)1628 476757. Registered in England 3037845. © Copyright 2018.

by Appointment to Her Majesty The Queen Manufacturers Of Wood Preservatives Protim Solignum Ltd Marlow, Buckinghamshire

0117 959 2008 | www.arvsolutions.co.uk | info@arvsolutions.co.uk

With a huge passion for the construction industry, we are the UK’s leading recruitment consultancy for the offsite sector and it’s supply chain.

Call today for confidential advice on your career: 0117 959 2008

• Exclusive vacancies • Dedicated divisions • Consultants who are experts in their field • We work with award winning companies from market leaders to start ups

@arvsolutions

MACHINERY

KING OF TIMBER CUTS ESSETRE Srl was founded in 1979 and for 40 years has manufactured woodworking machinery. The company is well known in marketplace for the care it dedicates to its products and above all, its ability to find new solutions based upon customersâ&#x20AC;&#x2122; needs.

For the UK market Essetre has developed specific equipment dedicated to the housing sector. In the CNC range special attention has been given to the processing of structural insulated panels (SIPS), timber frame, and cross laminated timber (CLT).

The machines Techno PM-SIP and Wall-SIPS are working well in UK by specialised companies offering a complete service for the structural building envelope using SIP wall and roof panels, including engineered timber floors and internal structural

STRUCTURALTIMBERMAGAZINE.CO.UK

spaces. With the marketplace focusing on improving building performance and using more offsite production, Essetre solutions guarantee to its customers low production running costs and great accuracy in processing.

MACHINERY

03 The peculiarity of the SIPS machines is that they have been designed thinking of SIPS characteristics. The PM and WALL have a closed cabin pre-designed for extraction connectors and a perimetrical collecting tank that allow the dust coming from the processing to fall on the bottom of the machine, where a conveyor collects it and transports the dust/chips out on the front side for the disposal. The machines can be configured to comply with specific customer requests. The machine designed in this way is extremely clean. There is the design option to add a second working area in order to work in tandem for nonstop production. The working area is composed by a Rexilon or MDF

04 table with independent vacuum areas managed automatically by the CN or manually activated/deactivated if needed. The range of machinery for the timber frame industry is one of the most complete in the market. From the entry level Techno Saw with 450mm x 150mm cutting capability to the Techno PF1250 able to process timbers and panels up to 1250mm x 600mm. Every model from Essetre has its own bespoke features. Out of the box and patented applications sit alongside heavy duty and long lasting structures that are part of the fabric of this Italian company that distributes and services the machines worldwide.

The Essetre machines can be delivered with the in-house Techno Essetre management software which leaves the operators free to automatically operate the CNC â&#x20AC;&#x201C; or with a wide range of customisable set-ups â&#x20AC;&#x201C; adapt the machine logic system to the most efficient way. Optimisation and simulation features, tool set-up and machine parameters contribute to a fast and high-quality production. The fast evolving housing industry requires great flexibility from the production process. The experience of Essetre with its five-axis working units is the answer if you want a reliable machine able to process the most complex shape and component design. Essetre Srl will be present at LIGNA 2019, Hannover, Hall 13, Stand D22 General Office Tel: 0039 0445 365 999 Email: commerciale@essetre.com Website: www.essetre.com IMAGES: 01-05. The range of Essetre machinery is perfectly aligned to the needs of the SIPS, timber frame and CLT markets

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DATES FOR YOUR DIARY IF YOU ARE INTERESTED IN LEARNING MORE ABOUT OFFSITE CONSTRUCTION IN THE TIMBER SECTOR AND THE ASSOCIATED MANUFACTURING PROCESSES THEN CHOOSE FROM SOME OF THE TIMBER SPECIFIC PLATFORMS TAKING PLACE IN 2019:

DATE

EVENT

VENUE

WEBSITE

21 May

Solid Wood Solutions

99 City Road, London

www.solidwoodsolutions.co.uk

Solid Wood Solutions will feature case studies on some of the major solid wood projects which have been delivered recently throughout the UK and Europe and this is supported by an exhibition of CLT and Glulam suppliers as well as complementary component manufacturers. 31 May

Structural Timber Awards – Entry Submission Deadline

www.structuraltimberawards.co.uk/enter/ awards

If you have an outstanding project, innovative product application and/or dynamic people promoting excellence in structural timber across the UK, then you should be entering the Structural Timber Awards and receiving the recognition that you deserve. Enhance the profile of your business and demonstrate a market-leading position by entering one of the 17 available categories today! 14 June

South West Construction Summit

Ashton Gate Stadium, Bristol

www.constructingexcellencesw.org.uk/summit

The Summit will bring together the regional construction industry and its supply chain to explore opportunities, major projects, client commitments and procurement best practice, including; skills, image, capacity and competency in areas around BIM and offsite construction. 14 June

South West Built Environment Awards

Ashton Gate Stadium, Bristol

www.buildswawards.org.uk

The South West Built Environment Awards bring together the industry and celebrate the best of the region and are firmly established as a high point in the South West construction calendar, each year commanding the attention of industry professionals from across the South West and beyond. 24-25 Sept

FFSITE

EXP

Offsite Expo

www.offsite-expo.co.uk

Ricoh Arena, Coventry

NEW FOR 2019 - OFFSITE EXPO brings together those who are driving change – the event will play host to the leading UK and international suppliers showcasing a broad spectrum of panelised, pod and modular solutions. Exhibiting companies will also have the exclusive opportunity to participate in the Offsite Buyers Forum - a dynamic environment facilitating meetings with leading architects, contractors, specifiers and purchasing managers.

RICOH ARENA - COVENTRY CONSTRUCTION

TECHNOLOGY

INNOVATION

TENMAT WIN THE 2019 QUEEN’S AWARD FOR INNOVATION FOR VENTILATED FIRE BARRIERS Firestopping for External Façade / Wall Cavities

+44 (0)161 872 2181

www.TENMAT.com



Maintains air gap to allow ventilation in timber cavities



Provides up to 120min fire rating



Expands in a fire situation to provide compartmentalisation



Tested within a vast range of construction types including Timber and Masonry



Unique, low smoke and zero halogen intumescent

passive.fire@tenmat.com

CALLING ALL BUYERS AND SPECIFIERS!

CONNECT

THE OFFSITE CONNECT - BUYERS & SPECIFIERS FORUM Embedded at the heart of Offsite Expo The OFFSITE CONNECT - BUYERS & SPECIFIERS FORUM offers a structured, highly effective way for buyers and specifiers to meet with new and existing offsite industry suppliers exhibiting within OFFSITE EXPO. We know that your time is at a premium - too much work, a busy schedule and not enough time to meet new suppliers. As a result, you may miss out on making contact with significant key people that could have ahuge impact on the future success of your business! Located at the heart of OFFSITE EXPO the OFFSITE CONNECT - BUYERS & SPECIFIERS FORUM provides a solution through ‘one-to-one’ business meetings with the companies you want to meet. The Forum process allows you to organise a bespoke programme of handpicked supplier meetings, which when coupled with relevant seminars over the two days, helps you fulfil your immediate to longer term project needs.

Exploit the best of business opportunities from Offsite Expo and Sign Up Today! If you would like more information about how to join the Offsite Buyers Forum, email Rhian Hassall at rhian.hassall@radar-communications.co.uk or go to:

www.offsite-connect.co.uk

FFSITE

EXP

RICOH ARENA - COVENTRY CONSTRUCTION

TECHNOLOGY

INNOVATION

The next generation of insulations by Pavatex To ensure you have the right speciďŹ cation and technical support, contact; by

Contact NBT T 01844 338338 E info@natural-building.co.uk www.natural-building.co.uk w

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