Issue 22 May/June 2020
IN THIS ISSUE:
DAYLIGHT, HEALTH & WELLBEING WORKPLACES CBDM SOFTWARE HOSPITALS GLAZED CANOPIES PLUS • NEWS • PROJECTS • AND MORE
Energy saving with rooflights? We wrote the book/s. Artificial lighting accounts for almost 20% of global energy consumption, so effective
NARM Technical Document NTD01.2
NARM Technical Document NTD04
2017
2009
An introduction to natural daylight design through rooflighting
A dynamic thermal modelling study of a typical metal clad building to evaluate overheating in the UK Report 090110BRE Prepared by Oxford Brookes Universtity Oxford Institute for Sustainable Development, Oxford 10th January 2009 Authors: Chris Kendrick & Shaun Wang
daylighting is a priority in sustainable construction. Independent research commissioned by NARM, proves conclusively that rooflights save
Issued in partnership with
energy in many applications – and we’ve published a range of informative technical documents for specifiers, covering different aspects of energy saving with
NARM Technical Document NTD10
NARM Technical Document NTD06.2
2014
2014
Designing with Rooflights Supporting Part L Building Regulation guidance in England; Approved Documents L1A, L1B, L2A and L2B (2013 editions)
Analysis of Improving Daylighting and Lighting Controls on a Number of Existing Non-Domestic Buildings
An independent report by Elmhurst Energy
Understanding rooflight U-values Welcome to this ‘Quickguide’: part 3 of a series published by NARM, to provide busy roofing contractors and installers with quick access to the information they need to maintain professional and compliant working practices. Requirements of The Building Regulations For all non-domestic applications, the worst acceptable standard for the thermal performance (U-value) of rooflights in new build work is stated as 2.2 W/m2k. For refurbishment or domestic applications, this figure is reduced to 1.8 W/m2k.
rooflights. They’re all freely
U-values for flat or ‘in-plane’ rooflights As the U-value is calculated by dividing the heat loss through the rooflight by its area, this is straightforward for flat, ‘in-plane’ type rooflights. Therefore, manufacturers’ quoted figures can generally be used to form the basis of building calculations without further consideration.
downloadable from our website.
U-values for ‘out-of plane’ rooflights Many rooflights are out-of-plane designs that sit proud of the plane of the roof (typically mounted on upstands or kerbs). The range includes modular dome or pyramid rooflights, continuous barrel vaults, and glazing bar systems. Furthermore, rooflights may be mounted onto upstands designed and supplied by others, which can effectively be considered as part of the roof, or some rooflights (particularly individual dome and pyramid modular rooflights) can be supplied as an assembly with a pre-manufactured kerb matched to the rooflight itself. Building Regulations state that the worst acceptable U-values for rooflights are based on the developed area of the rooflight (not the area of the roof aperture, which is the true U-value). This is termed the Ud-value, and can be calculated for either a rooflight alone, or for a rooflightand-kerb assembly.
Be enlightened at:
www.narm.org.uk
Rooflighting Best Practice Quickguide 03
Issued in conjunction with the National Association of Rooflight Manufacturers
Ud-values: the correct values for checking against limiting values in The Building Regulations The Ud-value is calculated from the developed area of the
rooflight. Where a rooflight-and-kerb assembly is being supplied, the rooflight supplier should be able to quote this value both for the rooflight only, AND for the entire assembly. To ensure Building Regulations compliance, both of these values must achieve the worst acceptable standard of 2.2 W/m2k. It is not acceptable to use an assembly of a rooflight with poorer thermal performance (such as double skin rooflights) on a kerb simply because the Ud-value for the rooflight-and-kerb assembly is better than the limiting values in the Building Regulations, unless the Ud-value for the rooflight alone also meets the limiting values. Full details are provided in NARM Technical Document NTD 2 ‘Assessment of thermal performance of out-ofplane rooflights’ which can be downloaded from the NARM website. Typical ‘out-of plane’ rooflight Entire surface area of rooflight & kerb assembly Surface area of rooflight
Minimum daylight area Roof opening area
Minimum acceptable thermal performance standards to ensure Building Regulations compliance: Rooflight only:
Rooflight & kerb assembly:
2.2 W/m2k 2.2 W/m2k
Further information Further information can be obtained from NARM, (National Association of Rooflight Manufacturers) at www.narm.org.uk
RIBA accredited CPD materials Available
THE TRADE ASSOCIATION REPRESENTING LEADING UK ROOFLIGHT SUPPLIERS
CONTENTS
REGULARS
05
Editor’s Comment
06
Industry News
12
New Projects
18
NARM Daylight Diary Updates from the UK’s influential trade association for rooflight manufacturers
34
Daylighting Icons The Pantheon, Rome
36
Twitterings What’s trending on social media?
37
More about DAYLIGHTING Magazine Back issues & media information
FEATURES
14
Daylighting Software A picture is worth a thousand ‘nerdy numbers’ David Maltby explains MBS Software’s daylight modelling plug-in for the popular SketchUp 3D software.
Bennett B2B Ltd Pure Offices Lake View House Tournament Fields Warwick CV34 6RG United Kingdom TEL: +44 (0)1295 711666 EDITOR Paul Bennett paul@daylightingmag.co.uk Tel: 01295 711666 Mobile: 07900 895110
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AD SALES info@bennettb2b.co.uk Tel: 01295 711666
More than just a feelgood factor NARM, the National Association of Rooflight Manufacturers, reveal some remarkable facts about the positive effects of natural daylight in buildings.
DESIGN/PRODUCTION info@bennettb2b.co.uk Tel: 01295 711666
Daylight, health & wellbeing
24 Hospitals When hospital buildings aren’t healthy Andrew Cooper looks at the issues of managing daylight and heat in hospitals, to provide healthier environments.
28 Workplaces Daylighting in post-lockdown office environments Rob Hamblen considers how daylighting can enhance working environments and its relevance in today’s changing office landscape.
31 Glazed canopies Finding solutions for socially distanced learning spaces Vicky Evans discusses the current requirement for schools to operate with increased distancing for pupils and how glazed canopies can offer a quick and cost-effective solution.
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DAYLIGHTING is published by:
WEBSITE www.daylightingmag.co.uk CIRCULATION Daylighting is available by email, free of charge to subscribers, by logging on at www.daylightingmag.co.uk Free access is also available via our website and social media. Average impressions per issue are approximately 5,500, however this varies according to social media activity. Our readership is predominantly UK architects, specifiers, contractors, consultants and roofing professionals. Full details are available on our website. www.daylightingmag.co.uk While every effort is made to ensure the accuracy of content, the publisher does not accept liability for errors. The views expressed by contributors are not necessarily those of the editor or publisher. This publication contains editorial photographs which may have been supplied and paid for by suppliers. Full terms and conditions can be found on our website.
Front cover: Hip-ended ridgelight in the central atrium at the recently refurbished Brintons Carpets HQ, Kidderminster. Article on p28. Image courtesy of Whitesales.
May/June 2020
3
ENGINEERING
THE UK’S TRUSTED DAYLIGHTING & VENTILATION SPECIALIST • Preferred supplier to leading architects, engineers & contractors • Multi-sector expertise • Design, manufacture, installation, servicing • All relevant accreditations & affiliations • RIBA CPD Providers Network member • Nationwide sales & support
Head Office: 01506 448140 Midlands Centre: 01788 579307 E: info@lareineengineering.com www.lareineengineering.com
EDITOR’S COMMENT
Building a positive future, as lockdown eases It’s still way too early to predict the long-term effects of the Covid-19 pandemic on our industry and on our everyday lives. However, as construction sites and manufacturers begin to emerge from the lockdown, it’s encouraging to note that many of the contributors to this issue are focusing on positive ways to move forward. You’ll find coverage of daylighting solutions that will help to address our changing needs, as we enter what will hopefully soon be referred to as the ‘post-Covid’ era. Rob Hamblen’s article on page 28 considers the changing role of office spaces as more and more businesses are considering extending work-from-home initiatives beyond the lockdown period. As some schools are now starting to re-open, Vicky Evans’ article on page 31 looks at how glazed canopies can create cost-effective additional teaching or recreational space to allow increased distancing for pupils and teachers.
Also on the subject of health & wellbeing, NARM’s (National Association of Rooflight Manfacturers) article on page 20 highlights some interesting and surprising facts about the positive effects of natural daylight in internal environments. Following on from the last issue’s coverage of a re-vitalised solar shading technology, SmartLouvre Managing Director Andrew Cooper, looks at ways to improve hospital environments through better daylighting with careful management of heat and glare on page 24.
Paul Bennett paul@daylightingmag.co.uk
For planners & designers, there’s also a look at a clever software plug-in that extends the the popular Sketchup 3d design program to include Climate Based Daylight Modelling functions. See David Maltby’s write-up on page 14. I hope you’ll enjoy the diversity and positivity of this issue. As always, if you’d like to comment or get in touch, please email me using the link opposite.
Issue 20 January/February 2020
THE INNOVATION ISSUE Issue 16 May/June 2019
IN THIS ISSUE:
DAYLIGHT MODELLING REFURBISHMENT SMART GLAZING PLUS • NEWS • PROJECTS • AND MORE
IN THIS ISSUE:
DYNAMIC SHADING
Don’t forget, back issues are always available to read on-line at daylightingmag.co.uk Previous issues of DAYLIGHTING Magazine will be available on-line indefinitely. So you can refer back to old issues whenever you like. It’s also on our ‘to-do’ list to set up a features index, so if you can’t remember in which issue you read that fascinating feature about XYZ, you’ll be able to find it in a moment.
AND OTHER WAYS TO COMBAT EXCESSIVE HEAT & GLARE • 5 REASONS TO AVOID UNDER-SPEC ROOFLIGHTS • DAYLIGHTING IN MUSEUMS & PUBLIC SPACES • ROOF SAFETY • PROJECT NEWS AND MORE
www.daylightingmag.co.uk
May/June 2020
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INDUSTRY NEWS
Birmingham 2022 Commonwealth Games contracts available for tender expedite many of these contract and job opportunities to get them ready, to offer some hope and opportunity during these unprecedented times. We want to say to the industry that we are open for business and are ready to engage with the supply chain as well as find the best talent from the West Midlands within the job market. In the coming weeks we will ramp up our recruitment and tendering processes for a broad range of services, including construction.
Ian Reid, CEO, Birmingham 2022
Throughout 2020, Birmingham 2022 Commonwealth Games will be making £145m worth of contracts available for tender and will recruit 109 people, which will double the current workforce. During a turbulent time for the construction industry, Birmingham 2022 is continuing with recruitment and procurement and can still provide some commercial hope and opportunity. The Overlay Turnkey contracts amount to £87m, with services including stands, fencing, tent structures and temporary roof structures, portable/modular buildings, groundworks, civils, internal build out, scaffolding, pedestrian and vehicle trackway and exhibition equipment. Ian Reid, CEO of Birmingham 2022 Commonwealth Games said:
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“We know this is a challenging period for many businesses who are trying to navigate these uncertain times. We remain resolute as we deliver the Birmingham 2022 Commonwealth Games and most critically, we are ramping up our recruitment as well as the search for specialist suppliers who will play a vital role in the successful staging of these Games.
Our supply chain will be critically important to the delivery of the Birmingham Commonwealth Games. We are determined to find and work with the best in class services, from the unrivalled experts within the UK construction industry.” All contract opportunities are made available here: https://commonwealthgames. finditinbirmingham.com/ All Job opportunities can be found here: https:// www.birmingham2022. com/get-involved/jobs/
There are a significant number of commercial opportunities associated with the games and we recognise the importance of these for a number of sectors. In 2020 we will have £145m worth of contracts available for tender and we will recruit 109 people; doubling our current workforce. These opportunities will begin to be advertised through our website over the coming weeks. We have been working to
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INDUSTRY NEWS
The Housing Forum urges government to stimulate the housing market and support homes for heroes The Housing Forum have prepared an extension of their manifesto which in 2019 set out a vision to increase both the supply and quality of new homes. This update sets out immediate, short and medium term measures focused on three interlinking objectives: · demand-side measures · supply chain resilience · housing delivery continuity Chair of The Housing Forum, Stephen Teagle said: ‘The focus of government and the whole of society is on tackling the immediate health crisis posed by Covid-19. As this is brought under control, attention will increasingly turn to recovery and the housing
sector has a strong role to play in this. This is a proposal to government to introduce measures to support the housing industry’s response to the impact of Covid-19. Its focus is on the known impacts of the virus and proposes interventions which will restore momentum to the delivery of new homes in England’. The paper sets out clear proposals and calls for clarity and support from Government. With many house-builders and contractors now recommissioning sites, the promotion of construction and housing delivery as vital infrastructure is key. The Housing Forum welcomes the announcement that construction workers are to be a key group
prioritised for testing. Promotion of their legitimate use of public transport and presence on site is also really important. Addressing Homes for Heroes, one of the demand side measures calls for the ‘Help to Buy’ programme to offer enhanced terms for key workers with additional government loans and a longer interest free period. Recommendations cover the breadth of the challenges in housing from mortgages, planning, land supply and local authority enabling through to dispute mediation and future procurement Read the full report here. www.housingforum.org.uk
Revisions to testing methods for fire performance of external cladding systems BSI has revised its test method for the fire performance of external cladding systems (BS 8414). The purpose of the large-scale test method is to provide data that enables the evaluation of the fire performance of the cladding components tested in combination. It does not provide information on how to interpret the data. The standard is split into two parts: • Part 1: Test method for non-loadbearing external cladding systems applied to the masonry face of a building. BS 8414-1 provides a test method for
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determining the fire performance characteristics of non- loadbearing external cladding systems, rainscreen overcladding systems and external wall insulation systems when fixed to and supported by a masonry substrate and exposed to an external fire under controlled conditions.
by a structural steel frame when exposed to an external fire under controlled conditions. This revision process included a 60-day public consultation and has resulted in amendments to Clause 6 and 8 and the expansion of Clause 9 and 10. Section 1 Scope and Section 4 principles have been clarified.
• Part 2: Test method for nonloadbearing external cladding systems fixed to and supported by a structural steel frame.
BS 8414-2:2020 can be downloaded here.
BS 8414-2 provides a test method for determining the fire performance characteristics of non- loadbearing external cladding systems, fixed to and supported
www.bsigroup.com
May/June 2020
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INDUSTRY NEWS
Boost to construction for logistics sector
The strain which the coronavirus crisis has put on the country’s supply chains for keeping retailers stocked with essential goods is set to boost investment in new warehousing and logistics construction. In an April update after the lockdown had started, David Sleath, chief executive of Segro the FTSE 100 developer which is the largest provider of warehouse space in the UK - said that he expected that the trends that have been driving occupier demand for high-quality, well located warehouse space will remain intact. He added that it: “…may even be strengthened by the crisis, as the importance of logistics supply chains has been thrown into sharp focus in recent weeks.” In a mark of its confidence in the logistics sector, Segro maintained its dividend payment to shareholders. Although most of the group’s new construction projects will be delayed this year due to the coronavirus,
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Segro retains a significant new development programme. It outlined plans earlier this year to undertake development capital expenditure over 2020 including infrastructure and land acquisitions – which it expected to exceed £600 million. Last year, Segro completed a record 871,800 square metres of new space, mainly warehousing, of which 92% is let. And up until the lockdown, the group had 826,200 square metres of new space under construction, most of which has been pre-let. The growing trends of e-commerce and urbanisation are continuing to drive demand for warehousing and are encouraging Segro to believe it can maintain development at these levels. The group’s positive message on the sector is echoed in recent Glenigan data. It shows that the value of new warehousing and logistics project-starts in the three months to February 2020 was up 40% on the period a year earlier. Meanwhile, the Glenigan Construction Review shows that Segro alone started 10 projects
worth £228 million in the year to January 2020. Other key players in the logistics sector with significant development programmes include: IDI Gazeley (with a development programme worth £169 million in the year to January), Roxhill (£142 million), Coventry & Warwickshire Development (£140 million) and St Mowden (£121 million). Key logistics projects Glenigan Construction data also highlights the strength of the construction pipeline in the sector and the key logistics projects where work is set to get underway around the country. In Leeds, Peel Logistics has had plans approved for a £69 million development of four warehouses on Phase 4 of its Gateway 45 project where work is expected to start in late 2020 and continue for 11 months. In Northamptonshire, plans have been submitted for a £65 million automotive logistics maintenance building at a motor speedway, the Rockingham Hub Development, which is at the pre-tender stage. The project involves over 6,000 square metres of space and work is expected to start in autumn 2020 and continue for 12 months. In Leicestershire, detailed plans have been granted for four new distribution centres covering 1.2 million square feet in a £47.5 million extension by Gazeley UK to Magna Park Lutterworth. Also in Lutterworth, Cullina Logistics has recently submitted plans for a £7.1 million extension to a warehouse/ distribution facility where work is planned to start in autumn 2020 and continue for nine months. www.glenigan.com
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INDUSTRY NEWS
Fire safety enhancement for Bristol social housing “These kinds of safety issues weren’t part of anybody’s thinking last year, and we’ve had to reconfigure how to safely go about this contract,” said John Woodcock. “Nor is it a straightforward project, with the screen itself being some 34 metres high and five metres wide. “It also a screen of varying dimensions, reducing to some 2.5 metres in one of the bay areas, which has added design complexity,” he said.
Steel Glazing Systems specialist Wrightstyle has begun work on a project to enhance fire safety on a 1950s social housing block in Bristol. The project was originally scheduled to have started last month, but was delayed because of Covid-19 lockdowns. “We will, of course, be respecting all hygiene and distancing protocols and using this contract to better understand how to work safely on a construction site,” said John Woodcock, contacts manager.
Like much of the construction sector, Wrightstyle has welcomed the easing of restrictions surrounding Covid-19. However, the company is committed to the absolute safety of its staff and other on-site contractors, and will be carefully learning how to assess best safety practices and how they can be incorporated onto other projects. www.wrightstyle.co.uk
The six-week project for construction company Rateavon is part of a redevelopment programme for Bristol City Council. Wrightstyle will be installing a protected escape route for Spencer Norton House, a ten-storey residential block. Prior to the new installation, an old aluminium non-fire rated curtain wall screen will be removed from the core of the stairway.
D AY L I G H T I N G S Y S T E M S
Spencer Norton House, part of the Redcliff Estate, was built as one of the City Council’s post-war neighbourhood units. Wrightstyle will be installing a double-glazed screen from its SR60 range, with a roof maintenance access door. The entire screen, from the ground floor upwards, will be fire-rated to 30/30. This will greatly enhance fire safety on this older-style residential block. A specialist team from Wrightstyle surveyed the site last year, and has conducted further site visits in the last two weeks. These new site visits have been required to reassess site access, working areas and how to ensure proper distancing and hygiene standards.
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May/June 2020
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INDUSTRY NEWS
New rooflighting information for homeowners
NARM, the National Association of Rooflight Manufacturers, has developed a new marketing campaign targeting homeowners and self-builders, in addition to their regular communications with architects, contractors and other construction professionals. NARM’s Marketing Committee Chairman Ian Weakford explains: “Recently, we have received a number of complaints relating to sub-standard glass rooflights which have either been sourced
from a questionable supplier, or fabricated by a non-specialist builder. Many of these have come from homeowners or self-builders, who have experienced problems with these installations. In some cases, there have been instances where safety of individuals both inside and outside their homes, has been severely compromised. For this reason, we have extended our marketing efforts to reach out to these groups with information and advice to help them avoid these issues.” The new campaign includes additional homeowner-focused sections on the NARM website; an information booklet entitled ‘Getting Rooflights Right: What to ask your builder or architect’, a display at the National Self-Build & Renovation Centre (NSBRC);
and a series of articles and social media posts covering specific rooflighting subjects of interest to home-owners. NARM is the trade body representing the UK’s rooflight industry - and the leading independent authority on rooflighting best practice. To become a NARM member, a rooflight supplier must meet key criteria relating to product performance and quality. For this reason, NARM membership can be seen as an assurance of compliance with the relevant standards and legislation pertaining to rooflights in the UK. For further information, visit www.narm.org.uk
Twinfix celebrates 30th anniversary Established in 1990 by Graham Kench, and originally offering a range of high quality glazing bars for installing multiwall polycarbonate, this year Twinfix celebrate their 30th Anniversary – a proud milestone in this family business that is now run by the management team that include Graham’s two daughters, Vicky Evans and Sarah Kench. Managing Director Vicky Evans commented: “It’s a great achievement to see Twinfix reach its 30th year anniversary. Our company is one that has grown
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throughout the years from the 3 people it started with to a team of 40 plus. We have evolved over the years and grown with the industry but we are really proud to keep our family ethos and the values Graham instilled on the company at the beginning, of a good quality product, hardworking team and a real passion and care for the product and service we provide are still inherit in the Twinfix model. As we enter into this 30th year the Twinfix team are excited what the future will bring and the new projects and people we will work with.”
Today, Twinfix offers a wide range of products from canopies, walkways and rooflights in additions to its original high quality glazing bars. www.twinfix.co.uk
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NEW PROJECTS Johnstone Town Hall, Renfrewshire Lareine Engineering designed and installed rooflighting for the multi award winning Johnstone Town Hall in Renfrewshire. The building is the first phase of the long term regeneration strategy for Johnstone town centre and home to range of modern community facilities including Johnstone library, a theatre space, ceremony suite, conference space, a coffee shop and meeting spaces. www. lareineengineering.com
Private Home, Brentwood, Essex
www.roofglaze.co.uk
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Photo: G.G. Archard
Two 1180mm x 2180mm external Roofglaze Walkon Flatglass rooflights were seamlessly integrated into the new balconied and decked roof terrace, at this private home in Brentwood. These allow large amounts of light through to the kitchen and lounge area below, all while maximising roof space and creating a ‘wowfactor’ that delighted the home’sowners.
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NEW PROJECTS Liverpool John Lennon Airport Twinfix worked with Principal Contractor Technical Construction Group Limited on a £750,000 project to design, manufacture and install a new covered walkway at Liverpool Airport. The 140 meter long walkway is made from aluminium frame powder-coated in RAL7004 with 6mm clear toughened glass to the sides. The roof comprises Twinfix’s Multi-Link-Panel NF system glazed with 16mm multiwall polycarbonate roof. www.twinfix.co.uk
London Screen Academy Architectural glazing systems by Kawneer, including aluminium heritage-style windows appropriate for the conservation area, have helped to transform the façade of an old radio and television factory into the new London Screen Academy. Kawneer’s GT70S slimline renovation open-in windows were the “focal new element” of the renovation of the façade of the four-storey building at Highbury Grove in Islington, north London www.kawneer.com
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May/June 2020
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DAYLIGHTING SOFTWARE
Daylight design & planning: a picture is worth a thousand ‘nerdy numbers’ The SketchUp suite of 3D modelling software is a popular design tool used by architects, designers and planners all over the world. Ukbased MBS Software offers a low-cost plug in for SketchUp, to make simple yet powerful daylight modelling and visualisation functions available to a wide user group. David Maltby explains the latest updates to the system... MBS Software have recently updated their increasingly popular Daylight for Sketchup plug in which now allows users to test all the compliance metrics outlined in the document entiled “Site Layout Planning for Daylight & Sunlight – A Guide to Good Practice” written by Paul Littlefair and published by the Building Research Establishment. This publication is commonly referred to as the “The BRE Guide” and provides the basis for compliance testing within the planning departments of most local authorities. The guide details what metrics need assessing for both the neighbour impact of new developments, and what to aim for to demonstrate good standards of daylight quality within those new developments.
Existing functions Existing functions within the program include the calculation of the Vertical Sky Component (VSC) and Annual/ Winter Probable Sunlight Hours, 2 Hour
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Sunlight to Amenity Spaces, Façade Analysis and Transient Shadows
New additions The new additions incorporate both Average Daylight Factor (ADF) and Daylight Distribution or No Sky Line (DD/NSL) calculations to complete the package by allowing for “light within” or “self test” studies. Outputs from the program are both graphical and tabular, allowing designers to simply and quickly run many iterations of their proposed schemes, to understand both the external and internal impacts at an early stage. Cutbacks and re-runs using an intuitive visual “traffic light” system to show pass/nearly/fail results, provides further assistance to speed the process of getting to an optimum layout with the minimum of fuss.
“Outputs from the program are both graphical and tabular, allowing designers to simply and quickly run many iterations of their proposed schemes, to understand both the external and internal impacts at an early stage.”
Other improvements to what is a regularly updated program, include tools to allow users to define how the various outputs are displayed. These have proved extremely useful
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DAYLIGHTING SOFTWARE
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DAYLIGHTING SOFTWARE
in presenting schemes to lay planning committees – where the old adage of “a picture being worth a thousand nerdy numbers” has never been more true. A number of local authority planning departments have recently started asking for results to be presented in their own formats, in an attempt at allowing for more consistency when assessing and deliberating upon these issues. The clear and concise nature of the MBS outputs greatly simplifies the presentation process.
Support services MBS provide simple video tutorials that allow for any competent Sketchup user to get up and running and producing reports very quickly. Coupled with their excellent technical support department, and “no fuss free seven day trial”, architects, designers, engineers and
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sustainability consultants now have everything they need to deal with the daylight and sunlight requirements for planning and good design. Founded in 1997, MBS Survey Software Ltd is a UK-based independent company specialising in providing bespoke software, expert analysis and training for professionals within the built environment. The company’s Waldram Tools software suite is well-known and used by planners, architects, developers, sustainability consultants and specialist right to light consultants to process calculations within an AutoCAD® environment. For further information, email: david@mbs-software.co.uk or visit: www.mbs-software.co.uk
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SPECIAL FEATURE
daylight diary Business as (almost) usual... 2May/June 020 During the Covid-19 lockdown NARM, The National Association of Rooflight Manufacturers, has remained active as an organisation – working on behalf of our membership and the wider public, using telephone & video calls, email and other collaborative technologies. We are also pleased to report that the majority of our member companies are now fully open for business, whilst following government guidance on social distancing and heightened hygiene procedures. Whilst many of NARM’s collaborative group activities have been put on hold over recent weeks, the Construction Products Association, CPA, has been working on the issues identified in the Dame Judith Hackitt report on the Grenfell disaster. NARM, along with other major construction product associations have come together under the stewardship of the CPA to recommend how the sector can improve the competency of those involved in the design, construction and maintenance of high rise residential buildings. The Competency Steering Group is pulling together the findings of twelve working groups
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in a final report which is due to be published in the coming weeks.
In addition to this, NARM’s Technical Committee has been involved in work being undertaken on upcoming amendments to the ACR[M]001 Red Book to clarify non-fragility of glass rooflights. NARM technical documents have also been referenced by ACR (Advisory Committee for Roofsafety) in recent correspondence with BSI regarding recommendations for amendments to the BS5516 standard for flat glass rooflights. Our Marketing Committee has also been busy with informative articles for trade and consumer media, as well as social media and other initiatives. You can find out more about NARM and download our technical documents at: www.narm.org.uk Access our on-line RIBA CPD seminar and other CPD materials at: www. ribacpd.com Become a NARM member
Stay up-to-date with NARM on LinkedIn and Twitter
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DAYLIGHT, HEALTH & WELLBEING
Daylight in buildings: so much more than just a ‘feel-good’ factor Everyone loves a well daylit space, so it’s no surprise that bright, airy interiors are at the top of the list of design requirements for building owners and developers in all sectors. But did you know that natural daylight brings a host of benefits way beyond the obvious ‘feel-good’ factor? By NARM, the National Association of Rooflight Manufacturers Over the last thirty years or more, research has revealed that the effects of daylight on the human condition are wide ranging and in many cases, remarkable. During this period, our lifestyles have changed dramatically throughout the developed world, with many of us now spending high proportions of our time indoors, whether at work, at home, or in our leisure pursuits. This fact has been the driver behind many independent studies across a variety of sectors, including healthcare, education, commerce and domestic dwellings. Some of the most dramatic findings have been made from detailed and wide-ranging research carried out in hospitals and schools. Here are just a few of the remarkable facts that have been revealed:
Daylight can play a role in recovery from physical injury or health problems A study entitled ‘Impacts of indoor daylight environments on patient average length of stay (ALOS) in a healthcare facility1’ published in 2012,
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found that a significant relationship appears to exist between indoor daylight and a patient’s average length of stay in a hospital. 25% of the comparisons showed that, in the brighter, daylit areas, the average length of stay by patients was shorter than less well-daylit areas by 16%-41%.
Daylight can assist pain relief
“...post-operative hospital patients in well daylit areas required 22% less analgesic medications during their hospitalisation.”
A study published in the Journal of Psychosomatic Medicine2 in 1995 concluded that post-operative hospital patients in well daylit areas required 22% less analgesic medications during their hospitalisation. This remarkable finding has had significant implications in terms of hospital design, patient care and benefits in terms of reduced medication side-effects treatment cost.
Daylight combats mental health conditions Two studies3,4 have shown that exposure to natural bright light is effective in reducing depression among people with bipolar disorder or seasonal affective disorder (SAD). Exposure to bright morning light has
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DAYLIGHT, HEALTH & WELLBEING
Image courtesy of VELUX Commercial
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DAYLIGHT, HEALTH & WELLBEING
Image courtesy of Lareine Engineering Ltd
also been shown to reduce agitation among elderly hospital patients with dementia.
Daylight improves concentration and study performance Several studies carried out in schools, have shown that daylight is not only good for children’s overall health and wellbeing, but that it can also significantly improve academic performance. One such study, ‘Clever classrooms: Summary report of the HEAD project’ drawing on data from thirteen European countries and a total of 2,387 children, concluded that academic performance can increase significantly when students work in well-daylit classrooms. Students with the most daylight in their classroms progressed 20% faster on maths tests and 26% faster on reading tests.
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Daylight reduces building energy consumption & emissions The IEA (International Energy Agency) states that electric lighting accounts for a staggering 19% of global energy usage and the resulting emissions of harmful greenhouse gases. Introducing more natural daylight into buildings has been proven to reduce this figure by minimising the requirement for artificial lighting during daylight hours5. For businesses and homeowners alike, ‘daylighting’ brings welcome reductions in energy bills as well as contributing to a more sustainable world.
…and the most efficient way to bring daylight into the built environment? Rooflights! Rooflights provide up to three times more light than the same area of vertical glazing. They can also provide a much more even distribution of
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DAYLIGHT, HEALTH & WELLBEING light, particularly in larger structures. Where vertical glazing exists, the effective area for natural lighting will only be within 6m of the wall containing the window. These facts are well understood by most people involved in building design. However the huge potential of rooflights to provide exactly the amount, type and distribution of natural light required
NARM, the National Association of Rooflight Manufacturers, is the UK’s trade body representing rooflight suppliers and a leading impartial authority on rooflighting design – and NARM member companies are able to provide rooflights to the appropriate design and specification for a given application, together with practical advice and support.
to meet any given specification is not always appreciated. Rooflights can help to provide natural light with qualities appropriate to the use of the building.
For further information about rooflighting and details of NARM member companies, visit www.narm.org.uk
1
Choi JH, Beltran L and Kim H. Impacts of indoor daylight environments on patient average length of stay (ALOS) in a healthcare facility. Building and Environment 2012; 50: 65-75 2
Walch JM, Rabin BS, Day R, Williams JN, Choi K and Kang JD. The effect of sunlight on postoperative analgesic medication usage: A prospective study of spinal surgery patients. Psychosomatic Medicine 2005; 67(1): 156-163. 3
Eastman, C. I., Young, M. A., Fogg, L. F., Liu, L., & Meaden, P. M. (1998). Bright light treatment of winter depression. Archives of General Psychiatry, 55(10), 883. 4
Lovell, B. B., Ancoli-Israel, S., & Gevirtz, R. (1995). Effect of bright light treatment on agitated behavior in institutionalized elderly subjects. Psychiatry Research, 57(1), 7–12. 5
NARM NTD06.2 Designing with Rooflights – Supporting Part L Building Regulation guidance in England; Approved Documents L1A, L1B, L2A and L2B (2013 editions)
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IMAGING
HOSPITALS & HEALTHCARE BUILDINGS
When hospital buildings aren’t healthy By Andrew Cooper, Smartlouvre Technology Limted
Climate change. Can anyone really argue with the volume of research and data that proves that the global warming effects are being caused by humans? That industry, infrastructure and the needs of humans are causing changing tides, seasons and generally, rising temperatures across the planet?
we’re damaging those elements.
We find ourselves needing to take more measures to manage the way we live. To maintain the living standards that we’ve become accustomed to.
One question that I’ve asked myself and my peers many a time, is why are we not building better, to accommodate the effects of the elements? The answer is always a wide range of justifications to the fact that we are. My argument in response is that in a lot of cases, we’re avoiding the obvious. To build with the effect of the elements in mind, we’re utilising technology in cooling that does quite the opposite.
Air conditioning is a relatively new invention that is becoming required more and more to manage the temperature in buildings. We all know that we’re spending increasing amounts of time indoors, avoiding the elements, and whilst we do, the fact is,
Hospitals and hospices are the biggest contradiction. In a healthcare environment the occupants need daylight more than ever. I don’t need to harp on about the benefits. A connection to the outdoors and having access to natural light helps patients
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“Hospitals and hospices are the biggest contradiction. In a healthcare environment the occupants need daylight more than ever.”
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HOSPITALS & HEALTHCARE BUILDINGS heal faster, making for a shorter hospital stay, and in general, the therapeutic environment that is strived for. So, whilst one would assume methodology for optimising daylight was applied in the initial phases of the building design, what were the architect’s/client’s overriding decision factors for the final design? Because there’s always a compromise. Was it high levels of daylight alone? Energy efficiency? Or a combination of both?
Managing heat & glare But what about managing the heat that the daylight also provides? Mitigating glare? Always a secondary factor in my experience. All too often disregarded,
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or at least deprioritised and found to be a problem after the building is occupied – by those who most need visual and thermal comfort, and those who are trying to care for them, in uncomfortable temperatures. And so, the Facilities Manager takes on the burden. Back in 2018 a UK heatwave saw NHS trusts bulk-buying mobile airconditioning units, fans and bottled water to help beat the negative effect of temperatures, which climbed to up to 40C inside wards. It’s a widespread problem, only expected to get worse. 2020 is predicted to be the warmest year in UK history when we are also dealing with a global Coronavirus pandemic.
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HOSPITALS & HEALTHCARE BUILDINGS that are vulnerable to overheating currently make up 90% of the total stock (by floorspace). A recent Cambridge University report found that some £17.5bn of upgrades could be needed to make UK hospitals resilient to the heat through new shading measures and improved ventilation. Overheating in hospitals is a serious issue.
MicroLouvreTM Fabric
Natural ventilation The pandemic brings this building cooling issue to the forefront. Cibse guidance is clear, we should wherever possible, enable the natural ventilation of buildings by opening windows and not use methods of cooling air by recirculation. Hospitals are complex builds to deliver, no-one would deny that. So, is that why solar shading isn’t prioritised? Or is it the cost of cooling? Or the effect on the environment that overrides? After all, installation of air conditioning uses large amounts of energy and contributes to climate change. Ventilation is needed, especially whilst dealing with the pandemic, but so is heat and light control. Worse still, healthcare trusts who don’t have imminent budgets for new buildings are seeing their running costs rise, year after year, in order to manage temperatures in buildings built when these levels of temperatures weren’t even a consideration.
Overheating: a serious issue The Committee on Climate Change (the government’s official climate change advisors) stated in a recent report that the types of hospital ward
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The general design guidance for healthcare premises as defined by the Department of Health isn’t prescriptive when it comes to solar gain and glare. It simply states that it should be controlled and suggests examples of providing control being through louvres and blinds. Internal or external, it doesn’t say. Furthermore, it suggests that thermal comfort conditions are ‘issues to consider’. Where are the standards? The minimum heat gain and glare, the temperatures acceptable at any given point in the day? Recuperating patients require a lot of sleep, which is interrupted at just 26C, and that’s just the start.
“Hospitals are complex builds to deliver, no-one would deny that. So, is that why solar shading isn’t prioritised? Or is it the cost of cooling? Or the effect on the environment that overrides?”
And so, the management of heat and glare is left to shading solutions that at best, remove only some of the problems, or at worst, also remove the benefits of the glazing and/or the daylight. Internal blind systems remove visibility and a connection with the outside world and only protect the room from a minimal amount of heat gain. External shading systems do work but are expensive to install and maintain as well as reducing the quality of daylight. Even the most recent advances in glazing technology reduce the view out.
So, what is the answer? How do you get optimum daylight distribution, visibility to the outside world, protection from glare AND the
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HOSPITALS & HEALTHCARE BUILDINGS opportunity for ventilation? You stop the heat and light before it hits the glass, with a metal fabric, with micro fine louvres woven in to dissipate the sun’s heat and energy but not block natural daylight, natural ventilation or vision out. This solution works totally differently from traditional external and internal blinds, which reflect, distort and restrict vision and light, MicroLouvre™ fabric simply and invisibly neutralises solar heat gain and glare before they even reach the window, working nonstop like a heat exchanger dissipating the sun’s heat and energy into the atmosphere. It doesn’t diffuse daylight, it provides all the benefits but not the negative impact of excessive heat gain and glare. The louvres are micro fine, and angled at a level to ensure optimum light in, and visibility out, whilst protecting the building occupants from the heat, glare and even external viewing in. It’s known as angular selective technology. The performance of this fabric has been tested, time and time again by standards agencies, scientists, and researchers, including the BRE. It’s not a fly-by-night product either. It’s been around since the 1940’s but in recent years, it’s been honed, and the production process improved, so that it remains the best solution for solar shading I’ve seen in my 45(ish) years in the business. Andrew Cooper is Managing Director of Smartlouvre Technology Limited, manufacturers of the world’s thinnest and lightest metal louvre fabrics. www.smartlouvre.com
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WORKPLACES
Daylighting in post-lockdown office environments Rob Hamblen, Sales & Marketing Director at Whitesales, considers how daylighting solutions can enhance working environments, promoting wellbeing for occupants – and the relevance in today’s changing office landscape. We are living in unprecedented times. That cannot be overlooked at the moment. What the future holds seems more uncertain than ever. With regard to the work environment there is much talk centred on the future of offices and workplaces. Will large majorities of companies transition their employees to permanent work from home scenarios? What will this mean for office buildings and the communal workspaces we have all become so accustomed to. Humans are naturally sociable creatures and have evolved our socially constructed environments to meet the needs of 21st century requirements in terms of working together, communicating effectively, and collaborating in teams. However, today’s working environments can also often be cramped and poorly ventilated spaces, where occupants find their output compromised through less-than-ideal physical conditions. Rapid re-structuring of the work environment is taking place to ensure employee health and safety – obviously the number one priority. But, in the longer term will we start to look at the wider aesthetic of working environments? For many office workers they have been experiencing a new way of working over the last couple of months. For some WFH ‘converts’ this has meant
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Zoom meetings from their sunlit garden or enjoying the sound of the birds and an abundance of fresh air with their home-office window open. What will happen to employee morale and productivity upon their return to dreary office environments? – whether that’s on a flexi-basis or other proposed new working schedules.
“...there is no question that natural daylight is always the best option when considering construction design.”
Too little daylight is proven to have a detrimental effect on health and wellbeing. Poor exposure to natural lighting can affect eyesight, create headaches and reduce motivation, productivity, energy and wellbeing. The same is true for poor air quality. Modern architects and designers currently benefit from extensive choices in terms of innovative lighting solutions, some seemingly replicating ‘real daylight’. However, there is no question that natural daylight is always the best option when considering construction design. Roof glazing, having evolved far beyond being a utilitarian source of light, has become a much sought-after connection to nature. Eye-catching and architectural, stylish roof glazing delivers outstanding aesthetics and creativity to buildings – and can bring balance between modern technology and the natural world. Incorporating natural ventilation further extends this connection. The breath-taking aesthetics of the ex-
Opposite: The recently refurbished Brintons Carpets HQ, Kidderminster.
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WORKPLACES
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WORKPLACES
tensive glass ridgelight make Brintons Carpets HQ case study an ideal reference point for highlighting the intrinsic qualities of natural light. The former headquarters of this renowned Kidderminster carpet manufacturer offers a stunning example of architectural glazing. The Exchange Street building became empty at the end of 2011 and much speculation surrounded what would become of the 31,275 sq. ft, three-storey, Grade II listed building. It’s now occupied by West Midlands Merchants Group, including luxury jewellery retailer, T.H. Baker. A bespoke Em-Glaze hip-ended ridgelight takes pride of place in the central atrium. Flooding the multi-function space with daylight, the installation also features integrated natural smoke control and comfort ventilation.
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The rooflight provides a dramatic lighting scheme and enhances the beautifully refurbished environment. Occupants moving between internal office suites, or utilising the open area on the ground floor, will surely benefit from the stunning aesthetics – with their eyes drawn upwards to the sunlight, connecting them to the outside world. What will the future hold for working environments – who can say? We’ll all be adjusting to the ‘new-norm’ for a long time to come it seems. Outside of the requirement for safe working conditions, let’s hope that inspiring, daylit spaces become a part of that norm, delivering a brighter experience for their occupants. www.whitesales.co.uk
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GLAZED CANOPIES
Finding solutions for socially distanced learning spaces Vicky Evans discusses the current requirement for schools to operate with increased distancing for pupils and how glazed canopies can offer a quick and cost-effective solution.
In the wake of current easing of the Covid-19 lockdown restrictions, there has been much discussion about the Government’s stated aim to have all primary children return to school for a month before the summer holidays. However, at the time of writing and with some schools already open to certain year groups, Downing Street has already claimed that this situation is under review.
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Britain’s biggest head teachers’ union has argued that a full return before the summer holidays will not be possible, because many schools are simply too small for this to be achieved safely, with recommended social distancing measures in place. This raises the question: as an alternative to schools remaining closed, can a simple solution be found to increase the space available to
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GLAZED CANOPIES “While traditional building extensions can be costly and take months to complete, canopies, shelters and walkways are quick to erect and more likely to fit within budget constraints.”
enable the required distancing in for pupils? The answer in many cases, is “Yes”. Glazed canopies and outdoor shelters are already used very successfully in schools all over the country. These versatile structures offer a cost-effective and quick solution to extending dining and recreational areas as well as classrooms. While traditional building extensions can be costly and take months to complete, canopies, shelters and walkways are quick to erect and more likely to fit within budget constraints. If a canopy is fitted with vertical glazing it will provide additional shelter from the lements – and the addition of lockable roller shutters can provide security, so the area can be used for night-time storage. It’s also worth noting that the standards and legislation relating to canopies are relatively simple and easier than conventional building extensions to achieve compliance.
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Twinfix is a family business, that has been operating for 30 years as a reputable and accredited designer, manufacturer and installer of high-quality, safe and fully compliant canopies, shelters and walkways Many thousands of Twinfix canopies have been installed over the years to create glazed covered areas at schools, universities, pubs, outside offices, hospitals, and sports centres. In addition to simply providing extra space, a Twinfix canopy can make an attractive focal point at any building entrance, or provide shelter over stairways and ramps for the disabled. Twinfix canopies hold the CE mark of safety, are installed by a team of DBS checked installers and are manufactured at the Twinfix factory in Warrington. The roofs feature the innovative Multi-Link-Panels NF, which can be glazed with insulating multi-wall or solid polycarbonate sheet, offering outstanding impact resistance and a long working lifespan.
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GLAZED CANOPIES These panels are non-fragile to the ACR[M]001:2014 drop test. The aluminium frames can be powder coated to match the building exterior. Using aluminium for the framework is Twinfix’s material of choice as it is such a versatile product. It can be formed into many shapes; it is relatively light in weight – making it easier and safer to handle and install. Aluminium is a great choice for a canopy as it does not rust in use and stands the test of time – so the use of an aluminium canopy or structure will extend way beyond the current post-lockdown era. For further information about Twinfix and how their product range can help utilise outdoor space, then please visit: www.twinfix.co.uk
: non-fragility, ACR[M]001:2014
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DAYLIGHTING ICONS The biggest: the best: the most awe-inspiring; the most outrageous; the most influential... In this regular feature we indulge ourselves and our readers with images of daylighting projects throughout the years that simply deserve a double page photograph...
The Pantheon, Rome The Pantheon, originally built as a Roman temple, now a church, was completed under the emperor Hadrian in approximately 126 A.D. The circular building features a Corinthian column portico and a rectangular vestibule that leads to the domed rotunda. The oculus at the dome’s apex and the entry door are the only natural sources of light in the interior. Throughout the day, the light from the oculus moves around this space in a reverse sundial effect. The oculus also serves as a cooling and ventilation method. During storms, a drainage system below the floor handles the rain that falls through the oculus. Measuring 43.3 meters tall and wide, the Pantheon’s structure remains the largest unreinforced concrete dome in the world.
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DAYLIGHTING ICONS
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Twitterings Follow us for regular updates between issues... in the meantime, more highlights...
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DAYLIGHTING MAGAZINE
DAYLIGHTING Magazine back issues Click on the cover images below to open back issues Issue 2 Jan/Feb 2017
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DESIGN & TECHNOLOGY FOR BETTER BUILDINGS
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EDITOR Paul Bennett paul@daylightingmag.co.uk Tel: 01295 711666 Mobile: 07900 895110 WEBSITE www.daylightingmag.co.uK
DAYLIGHT IN EDUCATION HOW WELL-DAYLIT CLASSROOMS AFFECT PUPIL PERFORMANCE
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