SA Roofing July 2014 | Issue: 61 by Trademax Publications

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JULY 2014 ISSUE: 61

SA R36 EACH INCL. / R360 PER ANNUM INCL.

JULY 2014

ISSUE: 61

EDITOR’S COMMENTS....................................................................................................... 2 COVER STORY...................................................................................................................4-6 IBTs........................................................................................................................................8-9 EMPLOYMENT EQUIT Y................................................................................................... 10 MBSA CONGRESS.............................................................................................................. 12 INDUSTRY NEWS........................................................................................................ 14-15 ROOF GARDENS................................................................................................................ 17 SAISC eTOOL...................................................................................................................... 18 TRUSSES.......................................................................................................................... 20-22 ENERGY EFFICIENCY................................................................................................. 24-26 COMPANY PROFILE.......................................................................................................... 30 INSULATION................................................................................................................. 32-33 CEMENT & CONCRETE............................................................................................. 34-35 ARCHITECTURE........................................................................................................... 36-39 WATERPROOFING...................................................................................................... 40-41 CEILINGS........................................................................................................................ 42-44 AFFORDABLE HOUSING NEWS............................................................................. 46-47 EVENTS............................................................................................................................ 48-49 ENERGY EFFICIENCY....................................................................................................... 50 CEMENT & CONCRETE................................................................................................... 52 PRODUCT NEWS.............................................................................................................. 54 PAINTS & COATINGS....................................................................................................... 56

Trademax Publications SA Roofing Tel: 0861 SA ROOF Tel: 0861 727 663 Cell: 082 266 6976 Fax: 0866 991 346 www.trademax.co.za Postnet Suite 241 Private Bag X103 N1 City 7463

PUBLISHER: Billy Perrin billy@trademax.co.za 0861 727 663 EDITOR: Jennifer Rees editor@trademax.co.za 0861 727 663 ADVERTISING: Jacqui Marsh jacqui@trademax.co.za 0861 727 663 LAYOUT & DESIGN: Craig Patterson craig@trademax.co.za SUBSCRIPTIONS & DATA: Celéste Perrin celeste@trademax.co.za 0861 727 663

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DISCLAIMER The views expressed herein are not necessarily those of Trademax Publications. Although we have done our best to ensure the accuracy of our content, neither Trademax Publications nor SA Roofing magazine will be held liable for any views expressed or information disseminated in this issue.

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EDITOR’S COMMENTS

A change is as good as.... A holiday? Well, I’m not so sure about that. As I write this, our managing editor is enjoying a well-earned holiday break, which is good in all ways except for my already-cluttered desk. Jen, you are missed.

ut about change – on my way in to work this morning, the radio news reporter said some or other economics pundit thinks that “radical” change is needed to boost and improve our economy. Yes, but what should that change be? And should the change be initiated by the private sector, or be driven by our cabinet, which has also just changed? The reporter continued, announcing immediate changes to our country’s immigration laws. Some of those changes appear to be radical, with potentially very restrictive consequences for skilled labour and other sectors. This follows on the heels of the proposed amendments to the Employment Equity (EE) Act, a very real and important part of legislation that must be adhered to (see article on page 10).

There were even more changes, according to the radio anchor: Yesterday it was balmy. Today it’s going to be cold. And tomorrow it’s going to be freezing. Well, nothing we can do about that – the seasonal change in weather is inevitable. And as we get settled into the winter months, and rainy season for some, we look to our insulators and waterproofers to tell us how best to deal with such climatic changes. As always, we welcome your questions, comments and feedback – about changes you feel our industry ought to see, or any other topic. Now, about that holiday.... We hope you enjoy the read. Celéste

Contributor for this issue: LYNDSAY COTTON Lyndsay entered the construction industry in 1989 and has many years’ experience in both the civil and commercial spheres of this industry. He is well versed in residential construction and especially roofing, as he erected many of the roof structures in over 300 luxury houses and upmarket units in residential clusters he constructed. Holding a BSc (QS) degree, and a Diploma in Project Management, Lyndsay is the General Manager of a leading Gauteng-based fabricator, and is the current Chairman on the board of the ITC-SA. Although work always takes a priority, his passion is exploring the back roads of Africa on a KTM990 Adventure motorcycle.

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COV E R S TO RY

MiTek 速 Ultra-Span速 LGS

roof structure for prestigious Mediclinic Centurion Hospital This extensively large shallow roof structure with the majority of 9 100m2 representing the Ultra-Span (LGS) roof system, was supplied and erected by Hi-Tech Nail Plate, a long-established MiTek licensed supplier.

COV E R S TO RY

n conjunction with Graceland Architects, this roof structure was from the outset designed by MiTek Industries to contain the greatest amount of LGS possible, although obviously certain sections still required conventional mild steel solutions. The utilization of the Ultra-Span (LGS) roof structure for 9 100m2 of the total roof represented almost 45 tons of steel, which equated to a mass of just below 11kg/m2 of roof structure - with some of the roof trusses being 19m clear span and carrying substantial imposed loads. This appropriate utilization of materials contributed to an overall saving of costs compared to utilization of just mild steel structures. A timber structure would not have been feasible due to the large spans with heavy loadings. In addition, with timber being a combustible material, it is usually not desirable for hospitals or other public structures. Due to the low self-weight of the Ultra-Span trusses, they were assembled on site into braced roof sections and then lifted into the final roof position by the site tower cranes. This process ensured that the overall completion could be done in just 5 months, even with weather often interfering.

FOR MORE INFORMATION, CONTACT: MiTek Industries South Africa (Pty) Ltd (t) 011 237 8700 (e) marketing@mitek.co.za (w) www.mitek.co.za

Graceland Architects, the QS â&#x20AC;&#x201C; Taljaard Meyer & Storm (TMS) as well as the final client, Mediclinic, are all very impressed with the performance and cost savings achieved through the utilization of Ultra-Span (LGS) roof structures as provided by MiTek Industries â&#x20AC;&#x201D; to such an extent that this project is just one of many where this technology has been employed. MiTek Industries South Africa (Pty) Ltd is very proud to be associated with Hi-Tech Nail Plate, whilst also wishing to thank them for the manner in which this project was handled to completion.

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LIGHT GAUGE STEEL The low mass per m2 (between 2-10kg) of this roofing system ensures both savings on the supporting structure as well as on transportation and erection costs whilst also being vermin proof and non-combustible. Large sections of the roof can simply be pre-assembled on the ground and hoisted into position on the walls – making this one of the most viable systems with a large range of applications up to a clear span of 40m. Supported through a substantial network of licensed truss suppliers, Ultra-Span is equally ideal for all local and export applications where it can be pre-assembled or site assembled. The non-combustible solution. MiTek Park,754 16th Road, Randjespark, Ext. 34, Halfway House,1685. Midrand (Head Office) Tel: + 27(0) 11 237 8700 Cape Town Tel: 021 905 0244 • Durban Tel: 031 700 6332 • Port Elizabeth Tel: 041 581 7525 email: marketing@mitek.co.za • www.mii.com/southafrica *MiTek

Industries South Africa (Pty)Ltd, a division of the worldwide MiTek Group.

creating the advantage

I BTs

Green light for LSFB in government structures At the Southern African Light Steel Frame Building Association’s (SASFA) recent industry feedback meeting, CSIR Principal Researcher, Building Science and Technology Department, Llewellyn van Wyk, said that, in principle, Innovative Building Technologies (IBT), including Light Steel Frame Building (LSFB), have been accepted by government for use in the construction of government-owned structures.

There has been significant growth in LSF building activity all over South Africa and a growing number of enquiries directed at SASFA from other sub-Saharan countries.

ccording to CSIR’s research, IBTs offer faster construction, lower costs, improved energy efficiencies, better quality control, provide decent jobs, and have a smaller impact on resources and the environment. “Accordingly it is no wonder that the PICC (Presidential Infrastructure Coordinating Commission) has decided to promote the use of IBTs, specifically for schools, clinics and student accommodation,” said SASFA director, John Barnard. “Within three years, some 60% of new buildings in these categories will be supplied using IBTs, which is excellent news for the light steel framing industry.” Van Wyk added that, using Agrément SA’s standards, there are currently about 40 IBTs active in South Africa and in terms of efficiency, using the CSIR rating system, the ‘standard’ brick house rated 32nd out of 40. “Because of the significant savings in energy and of the lifetime costs of ownership, LSFB and other IBT-built houses and other structures are growing exponentially worldwide and South Africa is no exception,” says Van Wyk.

SASFA current chairman, ArcelorMittal’s Hannes Basson, said that the LSFB industry had made great strides since 2007 and that SASFA had played a major role in this progress. “While this building method has been strong in many other countries including Australia, the US and Europe, it was regarded with some skepticism locally. But through SASFA’s education and promotional initiatives LSFB has become an accepted IBT in this country. For example, in 2007 it was impossible to get a bond for an LSFB building and now most of the major banks have bought into the technology,” Basson said. Local examples of the increasing number of high-profile LSFB users abound. One is McDonald’s South Africa, which is changing the way it builds its restaurants and has embarked on rolling out sustainable LSFB restaurants across the country. According to Greg Solomon, McDonald’s South Africa’s managing director, the company will continue to improve, evolve and pioneer.

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SPECIFY IT’S WHITE & GREEN CSIR Principal Researcher, Building Science and Technology Dept., Llewellyn van Wyk, at the Southern African Light Steel Frame Building Association’s recent industry feedback meeting.

THE ENERGY EFFICIENT INSULATION LEGISLATION SOLUTION Expanded Polystyrene is used for thermal and sound insulation in walls, roofs, and floors. Loose beads are used as aggregate in lightweight concrete, plasters and renderings. Also used for underfloor heating systems, drainage boards, permanent formwork, foundation and prefabricated wall systems.

EPS Rated A+: Summary of Green Guide Ratings for Expanded Polystyrene - Published by BRETrust 2011

In 2013 SASFA membership grew by 12% and LSFB by 21% compared with the previous year. Here, Pieter Reyneke, from Dalmar Construction, receives their SASFA membership certificate from John Barnard and Paolo Trinchero, CEO of the Institute of Steel Construction.

Low carbon footprint Conserves energy Life Cycle Assessment (LCA EPS reduces your

“The new restaurants are built using light steel frames (LSF) and energy efficient cladding and insulation systems. This decision stems from our philosophy to support sustainable building methods as far as design, energy efficiency and the optimal use of natural light is concerned,” says Solomon.

Meanwhile, Barnard reports that in 2013 SASFA membership grew by 12% and LSFB by 21% compared with the previous year. “Certainly the highlights over the past year are the significant growth in LSF building activity, the PICC announcement of support for new building technologies and the growing number of enquiries directed at SASFA from sub-Saharan countries – which indicates that LSFB is growing on the African continent,” he concluded.

FOR MORE INFORMATION, CONTACT: John Barnard (t) 011 726 6111 (e) info@sasfa.co.za (w) www.sasfa.co.za

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By using LSFB on this building, material wastage was reduced by 30%, transport costs by 80% and the carbon footprint was significantly reduced. On top of this, McDonald’s was able to cut back the construction period required, opening these outlets four months earlier than if more traditional building methods were used.

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E M PLOY M E NT EQ U IT Y

MBA North warns companies to prepare for employment equity legislation Master Builders Association North has urged its member companies, and businesses in general, to immediately take steps to ensure that they comply with the requirements of the proposed amendments to the Employment Equity (EE) Act.

r Deon Landmann, MBA North Education, Training & Transformation Manager, says the draft Employment Equity Amendment Act regulations were published for comment this year and will form the essence of the proposed Employment Equity Act. “The regulations were introduced as a result of the Department of Labour’s concern that too many companies were still not complying with the requirements of the Act which was introduced 16 years ago. The Department believes many black people, women, and people with disabilities, are still relegated to lower level jobs in the name of a ‘lack of skills’ and that it is now time to deal with the inequalities left behind by the apartheid legacy to achieve socio-economic freedom,” Landmann explains. Among the proposals contained in the Amended Employment Equity Act is the concept of equal pay for equal work, and discrimination on arbitrary grounds has also been added in terms of unfair discrimination. The amended regulations also include penalties for “breach of confidentiality, undue influence, obstruction and fraud.” “But, most importantly for South African businesses, failure to consult, conduct an analysis, assign a senior manager, publish reports, keep records, and comply with the Director General of Labour’s rulings to this effect within 90 days, can face a stiff fine of up to R2,7 million. MBA North strongly urges its members to immediately establish an Employment Equity Forum and train such a Forum’s members to deal with the new requirements of the Act,” he states. Landmann says employers affected by the EE Act and its amendments must submit annual reports by the first working day of October every year. “Designated employers are required to consult with employees, and conduct an analysis of the workforce and work environment including policies, procedures and practices. MBA North can assist companies in the implementation of an EE plan and provide guidance on the submission of annual reports as prescribed.” He adds: “There is a distinct need for employers to come up with some real, innovative and meaningful ways to change discrimination in the workplace by training and raising the skills of previously disadvantaged employees. Real and determined action is needed – we need to stop shying away from our responsibilities as employers.

Now is the time to establish structures for consultation with all employees to ensure that they are trained and fully understand the EE Act, urges MBA North’s Dr Deon Landmann. “Now is the time to establish structures for consultation with all employees to ensure that they are trained and fully understand the EE Act. Companies should immediately elect their EE forum members and have them trained.” Contact Sarah Mnyandu or Deon Landmann on 011 805 6611 for further discussions on how MBA North can assist companies affected by the new legislation.

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QUALITY AND INNOVATION Our roofing systems protect thousands of homes, commercial and industrial buildings. Achieving a good looking product is not sufficient in competitive global markets. It is attention to detail in the manufacturing process that has earned our roofing systems an international reputation for excellence.

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M B S A CO N G R E S S

Speakers Set to Share on ‘Building a Sustainable South Africa’ The 2014 annual Master Builders South Africa (MBSA) Congress will be taking place from the 21st to the 23rd of September at The Boardwalk Hotel and Convention Centre, in Port Elizabeth. Now in its 109th year, the MBSA Congress has become the premium gathering for building contractors, construction and project managers, built environment professionals, manufacturers and suppliers to the building industry.

nder this year's theme of ‘Building a Sustainable South Africa,’ the MBSA Congress will once again provide an opportunity for national and African representatives to come together and discuss the latest trends, opportunities and challenges faced by the building industry. The line-up of top speakers together with panel and delegate participation will stimulate relevant information and insight into many aspects of the industry.

nevertheless produce the best results in physical science and mathematics in South Africa. He has also written popular books like ‘Great South African Teachers’ (with two students), ‘We need to talk,’ and ‘We need to act,’ and is a columnist for The Times and Die Burger. He was recently awarded the Education Africa Lifetime Achiever Award in New York and the Spendlove Award from the University of California for his contributions to tolerance, democracy and human rights.

The focus will also be on the Eastern Cape, the province that is seeing the fastest growth in a number of areas, such as infrastructure, power generation and commercial and industrial developments.

When accountant Pierre Voges turned 41, he decided that he was tired of arguing about profit sharing and wearing suits and ties every day. So when the mayor of Port Elizabeth approached him to create the Mandela Bay Development Agency (MBDA), the objective of which was to regenerate the central business district, he accepted. The agency is not a municipal department but a section 21 company with the Nelson Mandela Bay Municipality and the Industrial Development Corp as shareholders. Voges explains, “At the MBDA we work on a master plan. Every year we implement two or three infrastructure projects.”

Some of the speakers scheduled to address delegates will include Clem Sunter, Prof Jonathan Jansen and Dr Pierre Voges. Top-selling business author Clem Sunter is one of the few specialists in the world on scenarios and their use in corporate strategy. He was one of the driving forces behind the South African High Road-Low Road scenarios that helped pave the way towards the country's peaceful transition to democracy. Since 1987, he has authored 17 books including the best-selling 'Fox Trilogy' with fellow scenario strategist Chantell Ilbury. Sunter was recently awarded an Honorary Doctorate by the University of Cape Town for his work in the ﬁeld of scenario planning and was also voted by leading South African CEOs as the speaker who has made the most signiﬁcant contribution to, and impact on, best practice and business in South Africa. Prof Jonathan Jansen is Vice Chancellor and Rector of the University of the Free State and President of the South African Institute of Race Relations. He holds a PhD from Stanford University, an MS degree from Cornell University, and honorary Doctorates in Education from the University of Edinburgh (Scotland), Cleveland State University (USA) and the University of Vermont (USA). He is a Fellow of the American Educational Research Association and a Fellow of the Academy of Science of the Developing World. His book ‘Knowledge in the Blood: Confronting Race and the Apartheid Past’ (Stanford 2009) was listed as one of the best books of that year by the American Libraries Association. His new book, ‘Schools that Work,’ uses video-documentaries to capture what happens inside disadvantaged schools that

According to MBSA Executive Director, Tumi Dlamini, “We are very excited not only to be celebrating our 110th Congress but to hear from these and other exciting speakers about how we as an industry can build a sustainable South Africa. With South Africa celebrating 20 years of democracy, the building industry will continue to play a significant role – driving growth and job creation for the sustainability of the country.” All members of the building and construction industry are invited to attend the MBSA Congress. For engineers, architects, construction managers, regulators or contractors both large and small the Congress is an important event to address issues affecting the industry and country. Construction managers, engineers, quantity surveyors and architects attending the Congress will gain Continuous Professional Development (CPD) points. Sponsorship and exhibition opportunities are available to companies wishing to support the event and ensure visibility of their brand, products and services to industry players. For more information about this year’s MBSA Congress, please visit www.mbsacongress.co.za.

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ALL THE RIGHT MOVES WHEN CHOOSING INSULATION 21

THE RIGHT CHOICE FOR INTELLIGENT ORGANS. MOVE TO BLOCK 25

24 YOU DID NOT USE LAMBDABOARD

SUPERIOR LONG TERM R-VALUE. MOVE TO BLOCK 16

16 HIGH COMPRESSIVE STRENGTH. ADVANCE TWO BLOCKS

LAMBDABOARD IS AESTHETICALLY PLEASING

8 MOISTURE AND WATER RESISTANT. MOVE TO BLOCK 14

YOU DID NOT USE LAMBDABOARD

THERMOSET, DOES NOT MELT, DRIP OR SPREAD FLAME

START

YOU ALWAYS WIN WITH LAMBDABOARD

REDUCES ENERGY USAGE IN A BUILDING. MOVE TO BLOCK 25

YOU DID NOT USE LAMBDABOARD

ENVIRONMENTALLY FRIENDLY & RECYCLABLE

AUTOMATICALLY ADVANCE TWO BLOCKS

Sometimes making the simplest choices makes all the difference to the environment. Lambdaboard is the eco-friendly choice when it comes to insulating your home,

office, building or warehouse. Lambdaboard offers the highest levels of insulation at an affordable price without damaging the environment. Use Lambdaboard today!

H O M E

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B U I L D I N G

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R E F R I G E R AT I O N

w w w. l a m b d a b o a r d . c o m

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I N D U S T R I A L

I N D U S TRY N E W S

Rigifoam appoints Youngman Roofing as its distributor in the Western Cape Considering Youngman Roofing’s extensive distribution network and loyal client base, it was an easy decision for Rigifoam to appoint them as their sole distributor for Lambdaboard and supporting products in the Western Cape region.

Calsin Centre, Kuilsrivier.

oungman Roofing already supplies a wide range of materials to the roofing market, from roof sheeting (Diamondek, IBR, Corrugated and Widek profiles) to Corroshield fasteners, flashings, bulk insulation and radiant barriers. With the ever-increasing demand for higher R-values as stipulated in the SANS building regulations, the need for higher level insulation products became apparent. Youngman Roofing identified an opportunity to complement their client product offering with a superior rigid insulation board, and Rigifoam presented the solution. Youngman Roofing will not only offer stock to the local “walk in” client, but also supply directly to site – with board cut to specific lengths for larger projects. Rigifoam’s experienced sales team will remain in place, collaborating seamlessly with the Youngman team. Backed by the well-established Rigifoam marketing structure, clients can look forward to receiving unmatched service in both supply and technical support.

Busmark Factory.

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Rigifoam and Youngman Roofing share the same strategy: Both companies want what is best for their clients. Through Youngmanâ&#x20AC;&#x2122;s distribution network, Rigifoam can now offer their clients an improved service.

FOR ORDERS AND ENQUIRIES: Youngman Roofing (021) 511 - 8125 info@youngman.co.za www.youngman.co.za

FOR FURTHER TECHNICAL INFORMATION AND CONTACTS:

Above: Porsche Workshop.

Rigifoam (Lambdaboard) Carol de Jager: 082 908 2877 www.rigifoam.co.za

I N D U S TRY N E W S

UWC New Science Building.

Cnr Berkley and Bax Roads, Maitland 7405

New extension to 28 Hudson Street, de Waterkant, in Zincalume Snaplok, Image and architecture courtesy of Leon Saven Design

South Africa should have more roof gardens, says Stephen Rault, GM: Marketing of a.b.e. Construction Chemicals, which supplies a wide range of roof garden waterproofing products. a.b.e. Construction Chemicals is part of the Chryso Southern Africa Group. Rault says: “From an environmental point of view, roof gardens clean the air through the plants removing carbon dioxide and trapping airborne particles on their leaves. Roof gardens provide micro-climates for fauna and flora: if indigenous vegetation is employed, the habitat for birds and insects are expanded and improved. “A major economic benefit is energy-savings: roofs with gardens lose 30% less heat in winter, are cooler in summer, and also offer year-round sound insulation. Plants cool the air and can substantially reduce the temperature of roofs. Roof gardens will protect roofs from rain, hail and wind damage. In this ‘green age’ we live in, houses with roof gardens could also have increased resale value. “Among many social benefits are the fact that roof gardens can absorb up to 75% of rainfall, thereby reducing run-off and the impact on storm water systems which can lead to flooding. The gardens also create new spaces for living and entertaining in heavily built-up urban areas,” Rault added.

A.B.E. CONSTRUCTION CHEMICALS’ WATERPROOFING PRODUCTS FOR ROOF GARDENS INCLUDE: • bituprime for initial priming of the roof surfaces; • unigum 3mm dural reinforced membrane for waterproofing; • super laykold or super laycryl flashing system to coat the roof surfaces. This is a bitumen, aluminium “peel and stick” waterproofing tape which has for years been widely used in South Africa for sealing and repairing leaky, galvanised roof sheeting; holes; overlaps; valley gutters; downpipes; flashing; roof screws; pipe vents; ridging and capping;

For green living, South Africa should have more roof gardens, says a.b.e. Construction Chemicals.

• ecofelt (or “Flashpack”) which is then laid over the area with further coats of super laykold. ecofelt is an exceptionally rugged non-woven, continuous-filament, needle-punched polyester geotextile; • abedrain, a light-weight high-density polyethylene protection membrane which offers great resistance to all chemical agents often found in soil and groundwater. abedrain is used to protect bituminous membranes in walls, basements, foundations and roof gardens; and • index defend H anti-roots, a non-woven polyester reinforced waterproofing membrane with an anti-roots additive. The product provides a continuous barrier against roots, even along overlaps.

WE CLEAN WHERE OTHERS FEAR TO TREAD! We clean and vacuum roofs We do animal exclusions We clean up dust, mess, old insulation etc. TEL: (072) 767 1999 / (011) 057 7020 E-MAIL: info@roofrats.co.za www.roofrats.co.za

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ROO F G A R D E N S

Roof gardens offer wide range of benefits

S A I SC eTOO L

The SAISC eTool - a necessity

The architects of the SAISC eTool kit, each bringing their particular expertise to the project: (l-r) Alex Elvin (Professor of Structural Engineering: School of Environmental Engineering WITS); Spencer Erling (Educational Director SAISC); Amanuel Gebremeskel (SAISC Engineer).

ollowing on from the article in the April 2014 edition of SA Roofing: At a recent press launch held by the Southern African Institute of Steel Construction (SAISC) the newly developed digital tool – the eTool kit – was demonstrated. This revolutionary tool will enable the structural engineer to design the appropriate structural steel connection at the ‘press of a button.’

STEEL STRUCTURES Picture your local shopping centre or big outlet with a steel roof. When you’re inside and you look up, your eyes see mainly the huge air-conditioning ducts. But what about the steel structure that holds the whole system up, and the joining of the steel elements? Every steel element must be connected to its joining ‘mate’ in a very precise manner.

THE CONNECTION DESIGN CHECKS FOR THE LOAD (FORCE) AT THE END OF THE BEAM: • Is the shaped end of the I beam strong enough; • Is the end plate thick enough; • Is there enough welding between the plate and the I beam; and • Are there enough bolts of the right diameter and strength in place?

THE eTOOL KIT: • Does all the laborious design check calculations at the click of a mouse • Assists the designer at the point of the mouse to find out what the weakest / strongest links in the connections are • Enables the designer to balance the links, which translates into “optimise the connection,” • Which translates into the most cost-effective connection This is crucial, especially from the structural engineering perspective: A mistake could lead to ‘merely’ a few bent plates that fail but leave the structure standing. But, it could also result in a total collapse of the system, with life threatening consequences. For more information on the eTool kit, contact Amanuel Grebremeskel with SAISC at (011) 726 6111.

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No matter what, we have you covered Uni-tile, universal grit coated metal roof tiles When you’re looking for roof cover that won’t let you down, Uni-tile from GRS is the really smart way to go. Universally compatible with other popular metal roof tiles, the cost effective Uni-tile is ideal for extension and re-rooﬁng projects, as well as for new roofs. As if that wasn’t smart enough, Uni-tile offers a wider top range for easier ﬁxing to the batten, a wider bottom lip for better water resistance, and a bigger side lap to prevent water leakage. Available in three standard colours (non-standard colours available on request*), Uni-tile’s 100% acrylic coating can withstand high ultra-violet levels and the most adverse of weather conditions, while the elasticity of the coating prevents the chipping and cracking caused by bad weather. So if you’re looking to go under-cover, get the cover that won’t let you down. Speak to GRS. The smart roof people. Talk to us, The Smart Roof People on 011 898 2900 or visit www.globalroofs.co.za or info@globalroofs.co.za *subject to minimum orders

GRS Unitile

GRS

GLOBAL ROOFING SOLUTIONS BrownBuilt | HH Robertson

TRU S S E S

Your erected roof structure:

Will your bank or insurance company assume the risk? By Lyndsay Cotton, General Manager of LCP Roofing and Chairman of the ITC-SA. THE DESIGN AND FABRICATION MUST BE ACCORDING TO NATIONAL SPECIFICATIONS – PART 1 The manufacture and erection of timber roof trusses in South Africa is governed by SANS 10243 and if the fabricator is one of the select few that are permitted to apply the SANS 1900 mark of quality, the consumer can rest assured that the quality assurance of the manufactured product is of the highest national standard. But what are the consequences if it is not?

Chipping or breaking out of the edges will reduce the strength of the joint. [See illustration A.] Defects in the timber, such as dead knots, wane, or resin infiltration, are not permitted in the plate contact area unless a larger plate is used to compensate for loss of penetrating nails.

There are only four accredited system software suppliers in South Africa that are permitted to supply software and nail plates for the manufacture of monoplaner timber trusses in South Africa. Site manufactured trusses, nail plates or bolted and nailed trusses with hips and valleys, are not permitted unless the contractor can prove that each and every truss and connection detail has been designed by an engineer who is generally recognised as having the necessary experience and training to undertake rational designs in the field of roofs and roofing.

7 EASY STEPS TO CONFIRM COMPLIANCE: Illustration A.

ACCREDITATION:

Check the ITC-SA Web site to confirm that the fabricator is not only a current member of the ITC-SA, but more importantly, that the fabricator was certified competent to manufacture a roof which falls in his category of competence? There are four categories of roof structures and these can be obtained from the ITC-SA website (www.itc-sa.org). Both the fabricator and designer must be competent and professionally certified, and it is always advisable to obtain proof of this.

NAIL PLATES:

The size of each nail plate in a joint is specially designed for that joint. Some software systems specify exact positioning which is not necessarily the centre of the joint and this must be checked with regards to the software system involved. Equally critical is the tolerance allowed in the designed position of the plate which, according to SANS0163-2, is currently 5mm, although some software systems will allow 10mm in either direction. In either case, the margin for error is extremely small. [See illustration B.]

TIMBER:

Only structurally graded timber which is either graded to S5 or S7 may be used in a roof structure. The use of "XXX" or ‘black cross’ timber is strictly prohibited, even in battens or purlins. Unscrupulous retailers have even described black cross timber as ‘triple strength,’ which could not be further from the truth. Structural timber must be marked along its entire length at one meter intervals with its applicable grading and the name of the supplying mill. The moisture content of the timber may not exceed 17% when fabrication commences, irrespective if the timber is treated or not. The maximum difference in thickness of members in a joint shall not exceed 1.0mm and the edges must be clean cut with a sharp blade.

Illustration B.

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Flattening of teeth is when any given tooth in a nail plate has a 1/4 or more of its length visible within the tooth slot opening. A tooth will also be considered flattened if the surface of the wood has been raised. The number of ineffective teeth in a plate due to flattening will be calculated as twice the number of visibly flattened teeth. Even a small number of flattened teeth will seriously compromise the joint. [See illustrations C & D.]

This even if a loading certificate was provided by the fabricator. A fraudulently issued certificate will naturally expose the consumer financially and, in the worst case scenario, for damages arising from a roof collapse. A bank may not pay out a building progress claim or an insurer may repudiate a claim, even if the failure is a number of years after erection.

TRU S S E S

The direction of the teeth placement in a nail plate is specifically designed for, and a square plate, for example, may only be positioned in one direction. Joints and plating thereof are not permitted in webs.

Financiers and insurance houses are becoming more and more aware of the importance of ensuring that their interests are protected in this regard.

JOINTS:

All members in a joint must be tight fitting and according to SANS1900, there may not be a gap greater than 2mm between the members of a joint. Where the joint length is greater than 300mm, a gap of 5mm is allowed, but tapering to 0mm. This is easily discernible on site and even a non-building professional can determine compliance with this requirement. The difference in thickness between members in the joints may not exceed 1mm.

QUALITY VERIFICATION:

Illustration C.

A consumer should require continuous verification of the quality of the prefabricated timber roof structure, and should not concentrate only on the finished product, but also direct his attention to the fabricator’s quality management system. It is therefore highly advisable that a consumer only transacts directly with a fabricator that can prove his adherence to the standards of SANS 1900 through his quality management system. This quality management system is not to be confused with the software systems accreditation or compliance to SANS 9001.

Illustration D. The gap between the nail plate and the timber is known as the embedment gap and this is measured through the slot openings of the nail plate. The tooth effectiveness table indicates the significant reduction in teeth strength per metal plate as the embedment gap increases. [See table below.]

Of the 213 fabricators in South Africa there are only 9 that are certified to apply the SANS1900 quality mark to their finished product. Where no information about a quality system exists, the consumer can resort to a complex sampling procedure according to the provisions of Annex B2.1 of SANS1900. This criterion of compliance is very strict.

STORAGE: TOOTH EMBEDMENT GAP (G)

TOOTH EFFECTIVENESS (%)

0mm < G ≤ 0.80mm

100%

0.80mm < G ≤ 1.16mm

60%

1.16mm < G ≤ 2.40mm

40%

G ≥ 2.40mm

Without nail plates the completed truss is just a number of positioned loose timbers. Incorrectly sized, positioned and embedded nail plates are, apart from defective bracing, the single largest cause of roof failures. The consumer cannot be expected to be able to check every joint in his roof trusses, and yet, should there be a roof failure, the consumer will need to prove that the roof was in full compliance with all industry requirements.

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Trusses, stored in the fabricator’s yard or on site, must be off the ground on a reasonably level surface and in a manner that distortion is prevented. Excessive exposure to inclement weather must be avoided, but a few days of rainy weather will not have any negative effect and the structure may be erected and covered and, as long as the timber’s moisture content is below 17%, it may be enclosed with ceilings.

TRANSPORTATION & HANDLING:

The consumer must insist that the trusses are transported in a professional manner. Only purpose made and specially adapted truss trailers should be utilised and where the trusses are transported in an upright position. A flatbed truck or trailer may be used but the truss must be supported across its entire length and height and no portion should hang off or protrude from the vehicle. All parts of the truss should be supported whilst handling and hoisting to prevent excessive bowing or twisting.

TRU S S E S THE CONSEQUENCES OF NON-COMPLIANCE:

Simply said, the consequences of non-compliance of the national standards will eventually result in a roof failure with potentially disastrous results and repair costs far exceeding the original roof costs by up to tenfold.

FOR MORE INFORMATION, CONTACT: Lyndsay Cotton (c) 082 441 5026 | 0861 LCPROOF (e) lyndsay@lcproofing.co.za (w) www.lcproofing.co.za

BENEFITS:

The benefits of insisting on the aforementioned standards will ensure that the building owner has a professionally designed and expertly manufactured roof structure and will furthermore rest assured that the risk of failure due to design or fabrication defects is eliminated. In part two of this article we will investigate the dangers of poor erection techniques and bracing. Even a perfectly manufactured truss system will fail within the first 7 to 10 years if incorrectly erected and poorly braced. For more information please do not hesitate to contact the writer for clarification and expert advice.

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E N E RGY E F F I C I E N C Y

Aurecon pushes ‘green’ boundaries for Grundfos When Grundfos, one of the world’s leading pump manufacturers and committed proponent of sustainable development, partnered with Growthpoint Properties, South Africa’s largest listed property company, to create state-of-the art office and warehouse facilities, the outcome was inevitably cutting edge.

he office component of the development has since been awarded a 5 Star Green Star SA – Office Design v1 rating by the Green Building Council of South Africa (GBCSA) and is the first industrial facility to be associated with a 5 Star rating in RSA. Aurecon, with its track record for bringing challenging project outcomes to reality, was commissioned as principal agent for this project in January 2012, with services including civil, structural and mechanical design and execution, as well as acting as Environmentally Sustainable Design (ESD) consultant. The offices have a gross floor area of 3 400m², while the warehouse covers 6 500m² and has been designed to complement the iconic office building. The project has been built on a high visibility site at the junction of the N12 and R24 in Meadowbrook, Germiston, giving it excellent exposure to major routes around OR Tambo International Airport. Two major challenges were encountered on the project: that of a very sloped site with large amounts of storm water flow during rainstorms, calling for innovative design techniques, and the need to implement Environmentally Sustainable Design (ESD) to the highest standards, including achieving ‘minimal usage of potable water’ status.

INNOVATIVE USE OF DIFFICULT SITE PRODUCES TIME AND COST SAVINGS In developing the design, the steep cross fall on the site – a 9m fall across 200m – coupled with storm water flooding from the site posing a concern, had to be closely considered. Very stringent requirements in terms of storm water management were imposed by the local authority (Ekurhuleni Metropolitan Municipality) as well as the various roads authorities (Gautrans & South African National Roads Agency Limited) to prevent flooding of the two major motorways at this junction. This required the attenuation of 1 250m³ of storm water. In a novel design decision, the slope of the site was cleverly used to accommodate parking underneath the buildings, resulting in the need for minimal ground works from a fill perspective, overall better space utilisation and faster construction time.

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E N E RGY E F F I C I E N C Y GROUNDBREAKING WATER MANAGEMENT A FIRST FOR SOUTH AFRICA The project’s rainwater harvesting system incorporates Grundfos’ own customised plant for purifying harvested rainwater to drinking water quality. This is believed to be the first implementation in a commercial office and warehouse building in South Africa. The domestic water supply of the building is designed to utilise three different sources of water, namely rain, borehole and municipal water. With an extensive rain water catchment area, oversized attenuation tank and purification plant the quantity of rain water supplied to the building exceeds the demand for municipal water, except in the dry months of July and August. To address this shortage, which is weather dependent, the system makes use of borehole water. The building will be supplied with municipal water only in the event of rain and borehole water being exhausted.

In addition, a storm water attenuation facility for the warehouse and the office building was provided through an oversized (1 500m³) concrete attenuation tank under one of the parking areas. The office and warehouse storm water attenuation facilities were therefore combined in a single structure, thereby facilitating speedy construction – earthworks started in July 2012 and the project was handed over on time in June 2013.

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With expected zero demand for municipal water supply during the period of October through to May, the design of the rain water harvesting system, incorporating the Grundfos technology for water treatment to drinking quality, considerably contributes to the alleviation of the stress in the bulk potable water supply network. What’s more, the office’s prominent bronze-coloured west façade incorporates vertical shading louvres consisting of Grundfos solar panels and mesh, which absorb the west-side sun energy, generating enough electricity to run all pumps in the rain water purification plant.

E N E RGY E F F I C I E N C Y DETAILED ATTENTION TO SUSTAINABILITY “The Grundfos offices were intended to achieve a Green Star SA Office v1 rating, but we applied ‘green’ principles to the warehouse as well,” says Aurecon Project Manager, Stoffel Mentz. The most notable sustainable feature of the Grundfos development, including both office building and warehouse, is the ability to be independent of municipal water supply for as much as 75% of the year. Apart from this, the office building has been designed to incorporate various sustainable features in line with Green Star SA requirements for certification. Significant ones include: • 70% of demolition and construction waste was re-used or recycled to minimise the amount sent to landfill. • All paints, adhesives, sealants and carpets were selected in terms of the Green Star SA guidelines for low volatile organic compounds. • Thermal insulation was used on the roof, the exposed ground floor concrete slab, and the spandrel panels in the façade. • In addition to the electricity from the solar panels installed in the fixed external shading louvres on the western façade, electricity is also generated by wind turbines on the roof. • Employee comfort and well-being is considered with fresh air provided at rates exceeding the minimum regulatory requirements of SANS10400-O. • Energy consumption is optimised throughout the building by using variable speed drives for mechanical equipment, energy efficient lighting, and heat pumps for supplying hot water for the kitchen and gymnasium, while all energy consumers above 100kVA are submetered and monitored. • Daylight glare control is achieved through vertical fixed shading elements in the western façade incorporating Photo Voltaic panels and internal blinds in the occupied areas. • Facilities are provided that encourage the use of bicycles. • In a novel touch that reminds car drivers to consider sustainability, those with fuel efficient vehicles have dedicated parking spaces.

“This was both a challenging and exceptionally satisfying project with all stakeholders aligned on extending the boundaries of sustainable building development,” adds Mentz. “Currently there are 54 Green Star SA certifications in the country and our client, Growthpoint Properties, has achieved six of these. They also lead the real estate sector in carbon disclosure in Africa. This project saw Grundfos augment their considerable global experience in sustainability techniques which helped to ensure that this flagship building, which will serve 43 countries throughout the African continent, is an outstanding tribute to their corporate values.” Please visit www.aurecongroup.com for further information.

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ZAP FASTENING SYSTEMS HAVE A VARIETY OF HEAD STYLES AND DRILL POINTS FOR ALL APPLICATIONS

ZAP FASTENING SYSTEMS RANGE FROM 13MM TO 180MM IN LENGTH

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WE TICK ALL THE BOXES FOR YOUR CEILING INSULATION REQUIREMENTS: • Professional, trained installation teams on site, saving you time and money • SANS 10400 XA compliant: we meet and exceed specifications • Latest SABS certificate: SANS 1381-6:2011: we meet and exceed NBR requirements • Highly efficient insulator with long-term product guarantees • Recycled, green and organic product, with no hazardous materials • A cost-effective outsourced contractor partner you can rely on

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Whether you are looking for a trade contractor or need to retrofit an existing building, contact us on 021 931 9015, info@lyhi.co.za or visit www.loveyourhomeinsulation.co.za.

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INSULATION

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I N S U L ATI O N

Eco-Insulation Gaps It Gap housing is best described as those residential units whose prices fall between those supplied by government and those delivered by the private sector. A perceived gap exists in the monthly income requirements for the prospective owner of between R3 500 for government housing and R15 000 for private.

Covering Gap Housing: Eco-Insulation. Image by Gareth Griffiths Imaging.

hese levels of income are too little to enable them to participate in the private property market, yet too much to qualify for state assistance.

The approach of the City of Cape Town is to induce the private sector to supply housing units at lower prices, and also to encourage low-income, employed individuals to build their own homes. According to the City, more cost-effective building technologies and materials contribute to delivering the gap housing product in greater numbers. Pelican Park is situated along the Southern shore of Zeekoevlei off Strandfontein Road and is about 5km north of the False Bay Coast.

When completed, it will include more than 2 100 statesubsidised houses, 696 single-storey semi-detached gap houses and 63 double-storey house shops from which residents will be allowed to operate small businesses. The budgeted cost was R 5-million of which a significant contribution is to be received from the provincial government of the Western Cape. â&#x20AC;&#x153;We are so excited about this project, as it will provide houses to 3 200 families in one of the first integrated housing projects in Cape Town. Home ownership is one of the most significant economic achievements for an individual,â&#x20AC;? said the City's Councillor Gqada.

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I N S U L ATI O N

The City of Cape Town’s Gap Housing Project at Pelican Park. Image by Gareth Griffiths Imaging. Eco-Insulation was contracted to install ceiling insulation to specification SANS 10400 XA Code of Practice. According to Eco-Insulation GM, Richard Ellis, this means that product had to be pumped into the ceiling of each residential unit to a thickness of 135 mm. Each housing unit (pictured), varying in size between 48m2 to 74m2 in area, is constructed in compliance with the SABS Energy Saving codes of practice.

SANS legislation requires minimum thermal performance standards, so installers who support this practice are not only flouting the law but also doing property owners a grave disservice. Check the trade association website www.tiasa. org.za for technical information in this regard, or visit the new Eco-Insulation website at www.eco-insulation.co.za for some good advice,” says Ellis.

Made from flame-retarded recycled cellulose fibre, EcoInsulation is an established green brand, giving developers peace of mind – meaning seamless service on site and 100% coverage inside the roof. The brand is truly the contractor's dream due to the very efficient process of installation. The product is installed professionally by teams of qualified fitters.

From the design perspective, Eco-Insulation provides the lowest carbon footprint of all insulation types available and is key to providing sustainable green-compliant solutions to the built environment for the foreseeable future.

Each home owner is issued with a certificate of warranty and hence peace of mind. Teams are available nationwide and in Botswana. “Specifiers, project managers and quantity surveyors are advised to appoint insulation contractors carefully. It is not uncommon for insulation to be laid at below the minimum specified thickness in order to cheapen the price to get the job.

FOR MORE INFORMATION: Eco-Insulation Tel: 021 555 3766 Email: info@eco-insulation.co.za www.eco-insulation.co.za

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INSTALL POLYCARBONATE ROOF SHEETING HARVEST THE DAYLIGHT AND SAVE ENERGY CALL US FOR COMPETITIVE PRICING TEL: 041 453 9835 or 0861 000 818 EMAIL: info@seindustries.co.za or admin@bestpolycarbonate.co.za WEB: www.seindustries.co.za

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C E M E NT & CO N C R E TE

Concrete roofs offer variety of possibilities Concrete tiles are increasingly becoming the roof covering material of choice for a variety of practical reasons, says Bryan Perrie, MD of The Concrete Institute.

Concrete roofing at a subsidised housing project at Kleinmond, in the Western Cape, where the roof facilitates rainwater harvesting and solar water heating.

errie says the development of sophisticated computer modelling systems has elevated roof design and construction far beyond the most basic functional purpose of shelter and into the realm of architectural sculptural masterpieces. “In line with these trends, advances in concrete technology and waterproofing technology make it possible to transform fantastic concepts into awe-inspiring reality,” he states. “Due to the durable nature of a concrete structure, a building envelope can be designed to accommodate a variety of functions over its lifespan. Examples of whole buildings being ‘recycled’ can be seen in the inner cities of Johannesburg, Pretoria and Cape Town where previously vacant office blocks are now being converted into affordable residential units close to job opportunities.

“Designed accordingly at the inception phase, flat concrete roofs can allow for additional storeys to be added later as the need arises, or funds become available, for increased densification – further optimising the use of well-located land and existing services. “As the demand for available land in the city centre increases, there is increased pressure to develop current open green spaces. With city centre space at a premium, a flat concrete roof presents an innovative opportunity to off-set the carbon footprint of a building by re-introducing the potentially lost green space at roof level in the form of a roof garden. At the same time, thermal insulation is also improved significantly inside the building.

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Perrie says the affordable housing market has seen a rapid growth in the specification of concrete roof tiles as the roof covering material of choice. “The timeless aesthetic appeal of concrete roof tiles undoubtedly transforms a house into a home. It requires no additional finish, is labour-intensive, with low-maintenance requirements. The roof pitch enhances interior thermal comfort by encouraging the convectional flow of hot and cold air caused by natural ventilation.

Bryan Perrie, MD of The Concrete Institute.

“Whether specifying in-situ or precast concrete as a roof application, the opportunity exists to create shelter that is at the same time both aweinspiring and sustainable by harnessing concrete’s natural qualities of sculptural flexibility, durability, affordability and thermal mass in conjunction with best practices and quality construction techniques,” he adds.

C E M E NT & CO N C R E TE

“Advances in waterproofing technology and the increased public awareness of the environmental benefits of roof gardens have led to this particular choice in roof finish to evolve into a variety of permutations. The design of water-wise roof gardens as well as food roof gardens is increasingly popular, with the latter presenting additional socio-economic benefits within the affordable housing market.”

A RC H ITEC T U R E

Binh Thanh House Located in the centre of Ho Chi Minh City in Vietnam, Binh Thanh House was designed for two families; a couple in their sixties and their son and his family.

he plot has a bilateral character and is located in a typical developing and urbanizing area in the city, facing a noisy and dusty street. It is also very close to the river and the Saigon Zoo with a plenty of greenery. Against a backdrop of this contextual duality, the purpose of the house is to accommodate two different lifestyles in a tropical climate; one is a natural and traditional lifestyle, utilizing natural lighting and ventilation with water and greenery, and the other is a modern and well-tempered lifestyle with modern fixtures, like airconditioners, for example. The house is composed of two different spaces that are positioned alternately. Spaces for modern lifestyle are allocated in three floating volumes wrapped by concrete pattern blocks.

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A RC H ITEC T U R E Between volumes are two in-between spaces covered by glass and that open widely to the exterior, where the residents enjoy their natural life with wind, sunlight, green and water. Three volumes are shifted back and forth to bring natural light into the in-between spaces, as well as to create small gardens on each floor. The bottoms of the volumes become the ceilings for the in-between spaces. These surfaces are designed with various curved shapes, providing each in-between space with a different light effect. Bedrooms and other small rooms are contained in the floating semi-closed volumes to enhance security and privacy. On the other hand, the open in-between spaces are designed to be independent living spaces for the two families. Patterned blocks, which used to be a quite popular device in Vietnam for natural ventilation, are made from pre-cast concrete with 60cm width and 40cm height, and help, not only to prevent the harsh sunlight and heavy rain, but also to enhance the privacy and safety of the house. While this house looks different from the stereotypical townhouses in Ho Chi Minh City, all the architectural solutions are derived from the local lifestyle and wisdom. The house, in which modern life and natural life are compatible with each other, offers an interpretation of the ecological lifestyle in the modern tropical city.

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A RC H ITEC T U R E

PROJECT DETAILS: ARCHITECTS: Vo Trong Nghia Architects, Sanuki + Nishizawa Architects PRINCIPAL ARCHITECTS: Vo Trong Nghia, Shunri Nishizawa, Daisuke Sanuki COMPLETED: 2013 STRUCTURE TYPE: Private house LOCATION: Binh Thanh, Ho Chi Minh City, Vietnam CONTRACTOR: Wind and Water House JSC + Danang Company SITE AREA: 140m2

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WATE R PROO F I N G

Problem roof leaks Increasing the durability of your roof

There are many reasons not to neglect a roof. Obvious or unforeseen roof problems are a nuisance and can mean significant unplanned-for expenses. One of the most common roof problems is roof leaks, which can cause untimely failure of the roof systems.

Areas where EasyFlash can be applied to prevent roof leaks

f water stains that extend across ceilings or run down walls are present, the cause is likely a roof leak. Roofs commonly leak due to flashing (waterproofing) details that werenâ&#x20AC;&#x2122;t fastened properly during installation, or underperforming flashing material. Wind-driven rain can also be the cause of leaks, especially around roof windows, dormer walls and through cracks, and flashing around chimneys can rust through if the chimney is of galvanized steel. Water can penetrate these areas and work its way behind the flashing and into the house.

EasyFlash rolls are easy and quick to install, and are made of a self-adhesive, high stretch (up to 60%) material with performance CH butyl glue for extreme adhesion to the application surface.

Over a short time, small leaks can lead to big problems, such as mold, rotted battens, spoiled insulation and damaged ceilings. Leaks should be addressed immediately to prevent major damage to the roof structure, and being wise to the products used on your roof, and the problems that may arise, is key to prevent their escalation. Traditionally, metal or lead flashing is used to seal junctions on the roof. Coverland provides a high performing lead-free alternative to traditional solutions that is not time consuming nor high maintenance, is not inflexible, and does not require an expert roofer to install: EasyFlash abutment seal.

EasyFlash black colour coated and aluminium composite with overall butyl backing.

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WATE R PROO F I N G

EasyFlash easily sticks to the surface.

EasyFlash Terracota and Connection Strip installed on a horizontal roof connection.

EasyFlash Terracotta and adjoining Connection Strip installed on a roof-sidewall junction.

DIY easy application.

Applicable to all tile profiles, galvanised sheeting or metal surfaces, EasyFlash provides a solution for additional application areas, such as an apron for skylights, solar panels, walls, chimneys and other rising structures. Even under extreme weather conditions, like long-term high temperatures, heavy rain and high winds, EasyFlash increases the durability of a roof, thanks to its outstanding weather resistance.

EasyFlash Brown,Terracotta and Black.

EasyFlash application includes the Coverland Connection Strip, fastened securely to the upper edge of the EasyFlash to provide additional sealing against water ingress.

ADVANTAGES AT A GLANCE: • All weather durability for 15 years used in conjunction with Connection Strip • Maintenance-free • Over 50% quicker installation time • Save more than 50% of costs over lifespan • Can be painted with any PVA paint to match surface Available at leading hardware stores nationwide or contact Monier Coverland at info.sa@monier.com or visit www.coverland.co.za.

EasyFlash and Connection Strip Installed around a chimney/corner wall.

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C E I LI N G S

PVC ceilings used in enhanced RDP housing project in Kimberley The 491-unit Department of Co-operative Governance, Human Settlements and Traditional Affairs (CoGHSTA) Lerato Park development was recently completed in Kimberley, and homes have now been handed over to those who were successful in their applications for RDP homes there.

Example of the homes built at the CoGHSTA Lerato Park development in Kimberley.

n this development the 491 low cost houses comprised 135 double-storey units, 116 semi-detached and 240 single freestanding units.

This project was an “enhanced RDP housing” pilot programme in what is hoped to be one of many more, said Dries Botha, National Group Procurement Manager for the construction company chosen for this project, Motheo Construction. This is one of the first RDP developments to have full plumbing, ceilings, plastered walls, tiled roofs and electricity in each unit, he said. “When choosing products for a home of this kind,” said Botha, “one has to bear in mind the future upkeep of the home and the affordability of doing so.

Those who qualify for low cost housing earn R3 500 a month or less, so it seems obvious that the products chosen had to be those that only needed minimal, if any, upkeep after they were installed,” he said. PVC Ceilings SA products were used in all the homes here (the area of PVC ceilings installed was ± 17 320m² in total), using their gloss finish board with PVCSA cornices. These products need no paint, which assists in two ways when it comes to cost control: firstly, in the actual installation, where the contractor saves on time and money (in paint) and, secondly, where the owner of the home will never have to paint the ceilings, said Botha.

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C E I LI N G S

“We chose this product specifically for the fact that it does not need painting. If you consider the costs of three coats of paint for 491 houses, plus the labour costs, the saving is substantial,” he said. “Apart from this saving, however, PVC Ceilings are also lightweight, easy to handle and store, they are fully waterproof and the thermal properties are good. This product is very costeffective compared to a conventional painted ceiling. An added advantage is that they were fairly easy to install once our team were trained.” PVC Ceilings SA have various products on offer, which include matt and gloss coated boards 3.6m, 4.7m and 6m lengths and 250mm wide. PVC ceilings have additional features, however, said Pieter van Heerden, managing director of PVC Ceilings South Africa. They also have antifungal properties, are corrosion resistant, fire retardant (B/B1/B2 SANS 428), termite proof, waterproof (no more damaged ceilings from burst geysers), easy to clean, and no further maintenance is necessary after installation.

Examples of the PVC Ceilings SA products used.

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This practical ceiling system is suitable for any indoor area requiring a fixed, non-porous, nonfibrous and non-absorbent ceiling. PVC Ceilings are very versatile and can be applied in just about any indoor environment, said van Heerden. They have the added benefit of being efficient insulators in summer and winter, due to the hollow core structure of the panels, and can reduce energy consumption in the home by eliminating the need to heat or cool it.

C E I LI N G S

Another example of the homes built at the CoGHSTA Lerato Park development in Kimberley. â&#x20AC;&#x153;In choosing a product for low cost or RDP housing, therefore, this seemed the right choice because of its various cost saving and insulation properties passed down to the owners,â&#x20AC;? said Botha.

A comprehensive list of PVC SA retailers is available at www.pvcsa.co.za and further information on the product can be obtained by emailing sales@pvcsa.co.za. Alternatively, contact Pieter van Heerden on 012 663 7297.

Product attributes: • Bold colours • More contrast • Enhanced protection • Aesthetic appeal • Security benefits • Lightweight (22kg per m2) • Versatility in design • Ease of erection • High wind resistance • UL A1 fire rating

Owens Corning’s High Performance Shingle Roofing System

A F F O R DA B L E H O U S I N G N E W S

Asrin and International Housing Solutions launch first phase of Muizenberg sectional title scheme Asrin Property Developers and International Housing Solutions (IHS) have launched the first phase of Ocean Breeze, a 213-unit sectional title development in Muizenberg.

he first phase is one of three - and will see 90 units being released for sale. These are all two-bedroom, onebathroom apartments with 60m² of floor area in threestorey walk-ups. The units are priced at R599 900, including VAT and transfer costs. “Quality finishes have been specified for this development, including granite countertops in the kitchen and ceramic tiles on the floors, and certain green measures have been taken such as solar heated geysers - which will help residents here keep their electricity consumption to a minimum,” said Shiraaz Hassan, commercial director for Asrin.

Being in a conservation area, it is surrounded by fynbos and there will be ample landscaped green spaces within the development for the residents to be able to enjoy an outdoor lifestyle,” said Hassan. This development is within easy walking distance of Surfers’ Corner and Capricorn Park retail centre and business park, and is close to public transport routes. Ocean Breeze will have allocated parking bays, a swimming pool, a clubhouse, communal laundry facilities, a braai area and a play park, and will have access-controlled security gates with a guardhouse at the entrance.

“Ocean Breeze is situated on Sunrise Boulevard, just off Prince George Drive in Muizenberg, a stone’s throw from the beach.

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Artist's impression of Ocean Breeze, an Asrin and International Housing Solutions joint venture sectional title development in Muizenberg.

“We are very excited about being able to launch this development,” said Hassan, “as this is the first new development in this part of Muizenberg in recent years, and we feel that this type of housing in this price bracket is much needed in the area. We strongly believe there will be a quick sell-out of the units at Ocean Breeze, and the fact that all four major banks have found value here and are willing to offer qualified buyers 100% bonds will make the sales process even smoother.” The agents who will be handling sales at Ocean Breeze are Seeff (Gary Grobbelaar - 079 929 3588) and Harcourts (Donna Stevens - 076 264 9805) as well as Asrin’s own in-house agent, Barbara Stapelberg – 082 440 6080. Handover for the units in this development is expected to begin by April 2015. “The prices and offerings here can probably be compared to what can be found on the West Coast and in some parts of Tableview,” said Hassan, “but units here are definitely 50% more affordable than the equivalent the southern suburbs.” For further information contact Barbara Stapelberg on 082 440 6080 or email sales@asrin.co.za.

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E V E NT S

Top speaker line-up for UIA2014 Durban World Congress Durban ICC from 3-7 August 2014 Don’t miss the largest gathering on architecture and city-making ever held in Southern Africa

rrangements for the 25th World Congress on Architecture, UIA2014 Durban, are powering ahead at a rapid pace and Durban will soon have the eyes of the world firmly fixed on her as she plays host to the biggest gathering of architects ever held in Southern Africa at the International Convention Centre Durban (ICC) from 3-7 August 2014. The Congress will bring together architects, design and built environment professionals, pioneers in urban planning and thinking, activists, city makers, academics and researchers, students, government officials, decision makers and thought leaders, citizens and communities – to debate and discuss alternative strategies for the design and delivery of more habitable, functional and beautiful cities.

Ngonyama (South Africa), Joe Osae-Addo (Ghana), Gerardo Salinas (Mexico) and South African Wally Serote, make an impressive line-up for the 25th World Congress on Architecture, UIA2014 Durban. Besides the exciting Scientific Programme, a dynamic and diverse Parallel Project and Cultural Programme is on offer, showcasing local, national and international talent. During the event, delegates will be able to participate in keynote sessions, interactive panel discussions, debates, exhibitions, film screenings, tours and walkabouts, cultural events, social and networking activities.

SPEAKERS & PROGRAMME Toyo Ito (2013 Pritzker Architecture Prize), Wang Shu (2012 Pritzker Architecture Prize), Cameron Sinclair, and a host of other top-drawer speakers, including Susannah Drake (USA), Francis Kéré (Burkina Faso), Rahul Mehrotra (India), Sindile

Wang Shu

Cameron Sinclair

Toyo Ito

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E V E NT S

AND THERE’S MORE Open to the public, a Trade Expo will showcase the latest product developments, technological innovations, and service offerings in the world of architecture and design. If you’d like to participate, visit: http://www.uia2014durban.org/get_involved/exhibitions.htm

For more information and to register, visit www.uia2014durban.org. Follow us on: Facebook: https://www.facebook.com/ UIA2014Durban Twitter: https://twitter.com/ UIA2014Durban/

REGISTER TODAY! Architects, design and built environment professionals, and all those involved in city making are urged to register as soon as possible so as not to miss out on this opportunity of a lifetime.

DELEGATE REGISTRATION FEES: • R5500/approx. USD 530 until 30 June & • R6500/approx. USD 630 from 1 July

Students’ registration fee is: R750/USD 70.

CPD CREDITS:

EJOT® The Quality Connection

CPD credit values for South African architectural professionals are: Full attendance all days (3-7 August 2014) – 5 SACAP Category One Credits

UIA INTERNATIONAL CREDITS:

• 50 UIA International Credits for attendance on all days • 10 UIA International Credits per day of attendance

PAH SALES AGENT (PTY) Ltd The UIA2014 Durban World Congress is proudly hosted in 2014 by the South African Institute of Architects (SAIA) with the support of the SA Council for the Architectural Profession (SACAP), the KZN Institute of Architects (KZNIA), the Department of Public Works and eThekwini Municipality, with sponsorship from PPC and Italtile.

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Official Sales Agent for EJOT® Tel: +27 (0) 11 394 5721 Patrice.ahmann@gmail.com www.ejot.de

E N E RGY E F F I C I E N C Y

Saint-Gobain Gyproc decorative cornices earn Premium Ecospecifier SA Product Listing Saint-Gobain Gyproc’s range of decorative cornice products and adhesives suitable for residential and commercial applications has achieved the prestigious Premium Ecospecifier SA Product Listing. This accreditation verifies that the products have undergone an independent and unbiased assessment and are eco and health preferable products.

his Ecospecifier accreditation for the company’s cornice and related adhesive products follows closely on the accreditation recently awarded for Gyproc plasterboard, ceiling tiles and plaster products. According to Ecospecifier SA, all products submitted for evaluation by Saint-Gobain Gyproc achieved accreditation verifying them as commercially available, environmentally preferable products, or materials that have environmental qualities that reduce potential environmental impacts across their life cycle. Gyproc RhinoArt Cove and RhinoBed adhesives are manufactured according to ISO 9001 quality, and the evaluation confirmed that all products will last the lifetime of the building. The Gyproc RhinoArt Cove, RhinoArt Cornices and RhinoBed have been used in a number of prestigious commercial property developments in South Africa, including: Eskom Head Office, Michelangelo Towers in Sandton, Cavendish Square refurbishment, 15 on Orange Hotel in Cape Town, and the Hillcrest Private Hospital in KZN - to name a few. “We are very proud to be able to add our decorative cornices and adhesive products to the stable of products, including Plasterboards for walls and ceilings, and our range of ceiling tiles and plaster products, which have all earned the highly valued Ecospecifier accreditation in the past six months. We are committed to managing the impact our products have on the environment and urban habitats, whilst ensuring their sustainability making a positive contribution to buildings and their users,” says Evan Lockhart-Barker, GM Marketing SaintGobain Gyproc.

ECOSPECIFIER SA PREMIUM LISTED SAINT-GOBAIN GYPROC CORNICES AND ADHESIVES: • Gyproc RhinoArt Cove • Gyproc RhinoBed • Gyproc RhinoArt Cornices (Angelico/ Giotto/ Endini/ Cezzane/ Broch) • Gyproc RhinoArt Adhesive For more information on Saint-Gobain Gyproc’s products and sustainability activities, please visit www.gyproc.co.za.

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C E M E NT & CO N C R E TE

Chryso S.A. admixture counteracts blow holes in precast concrete “Blow holes in concrete – a precast concrete producer’s worst nightmare – can be vastly reduced or virtually eliminated by adding Chryso Fluid Premia 100, a new ‘New Generation’ admixture produced by Chryso Southern Africa, to the concrete mix,” says Eddie Correia, Chryso SA General Manager: Technical Services.

Blow holes in precast concrete are regarded as a cosmetic nuisance – but too many are ugly and may threaten durability.

low holes (also known as “bug holes”), are individual, rounded or irregular cavities generally less than 10mm across in size that appear on vertical surfaces of concrete. The blow holes are usually regarded as a cosmetic problem, but large concentrations of these holes may impair durability in precast concrete structures. “The tiny holes are surface voids that result from the migration of air entrapped inside moulds and become visible when the moulds are stripped from the concrete. The blow holes generally appear as a result of insufficient vibration, the use of incorrect form-releasing agents, the presence of water in the mould, and – importantly – the formulation and design of the concrete mix,” Correia explains. “Chryso SA has indeed found that the concrete mix design can be a significant contributor to blow hole formation. A sticky or stiff mix that does not respond to consolidation causes increases in bubbles and blow holes whereas workable, flowing mixtures are easier to vibrate and reduce the risk of blow hole formation. That is why the use of Chryso Fluid Premia 100 super-plasticiser in the mix to create increased workability can play such an important role in counteracting blow hole formation,” he states. When added to the concrete mix, Chryso Fluid Premia 100 improves workability retention at all levels of consistency compared with standard additives. “Concrete, mortar and grout, when produced using Chryso Fluid Premia 100 in the mix, are low in viscosity and less sticky. This means surface finish aesthetics are substantially improved due to a reduction of surface bubbles. The concrete’s pumping properties are also much better because of the admixture’s specific formulation, which is based on BET 185-014, a modified phosphonate.”

Michael Christopher, General Manager of GPT Concrete Products South Africa, has been impressed with the blow hole prevention properties of Chryso Fluid Premia 100. Correia says the super-plasticiser has been widely welcomed in the South African precast industry. Strong support of the product has, for example, recently come from a precast industry leader, GPT Concrete Products South Africa (part of the GPT Group) that designs and manufactures pre-stressed concrete railway sleepers. With its corporate office in Kolkata, India, GPT has been manufacturing concrete sleepers for nearly 30 years and also has plants in other countries like Bangladesh, Sri Lanka, Cambodia, Iraq, Ghana, Mozambique, Myanmar (Burma) and Namibia. Michael Christopher, General Manager of GPT Concrete Products’ operations in Ladysmith, KZN, says: “Chryso Fluid Premia 100 is an incredibly robust admixture which, when added to our mix, helps to produce less sticky concrete while achieving high early strengths. To release the pre-stressed wires, GPT concrete has to reach at least 35 MPa in strength. This is achieved - together with steam curing - in as little as 11 hours, ensuring greater recycling of moulds and faster sleeper production,” he stated. “GPT is one of the pioneers in manufacturing pre-stressed concrete sleepers and is committed to producing a quality product with zero tolerance towards blow holes on our sleepers. The Chryso admixture has played a major role in maintaining our high standards,” Christopher added. The GPT plant in Ladysmith was opened in 2009 and produces around 24 000 concrete sleepers per month. For more information, contact: Kirsten Kelly, tel (011) 395 9700 or visit www.chryso.com.

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The one and only construction show for the Western Cape

Special offer for SA Roofing readers! Quote code SAR001 for a 10% discount on your conference registration. Contact: Tamsin Collins on +27 21 700 4354 for more information

REGIS T EARLY ER AN SAVE D !

Conference and exhibition As part of the African construction event series

13 â&#x20AC;&#x201C; 14 August 2014 Cape Town International Convention Centre Cape Town, South Africa

Association partners MEMBER

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PRO D U C T N E W S

Sika launches MultiSeal-ZA in SA Sika MultiSeal-ZA is a self-adhesive, bituminous sealing tape; one side laminated with aluminium foil.

his handy DIY product is an ideal, quick-fix solution for sealing and repair against water ingress and draughts in roofs; including sheet metal work, building cracks, inside of gutters, and bituminous felts and other types of roofing sheet. Sika MultiSeal-ZA is UV resistant, very easy to apply, economical, weather-proof and it can be overpainted. It allows easy adhesion to many substrates, is bitumenresistant, and can be applied at low temperatures. Using it is easy â&#x20AC;&#x201D; simply clean the surface area, cut the tape to the necessary length, remove the release film, and press the tape firmly onto the substrate with a suitable pressure roller. Voila! Due to market demand, Sika has launched this product in three new sizes: 50mm x 2.5m, 75mm x 2.5m and 100mm x 2.5m. It is available at all good DIY stores. For further information on Sika products and systems, visit www.sika.co.za.

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ISOVER`S Insulation is environmentally friendly Isover is a leader in the manufacture of thermal and acoustic insulation. Our products are some of the most popular & widely used environmentally friendly, stable and sustainable insulation materials available today. Isover`s insulation can save 100 times the energy consumed and CO2 emitted in their manufacture, transport and disposal. LOCAL MANUFACTURING Isover South Africa invested in the latest TEL fiberizing technology which has improved the quality and performance of our products. Glasswool, ULTIMATE and EPS are manufactured according to ISO 9001 Quality Management System standards and our Springs plant achieved ISO 14001 environmental management certification in 2012. ENVIRONMENTAL IMPACT Buildings typically account for 40% of all energy consumed in countries and by insulating with Glasswool it is possible to significantly improve the energy efficiency and comfort of buildings. Glasswool is made from a combination of naturally occurring silica sand, fluxing agents and up to 80% recycled glass. Glasswool has a Zero Ozone Depleting Potential (ODP) and no CFC`s or HCFC`s are produced in the production process. Glasswool can be compressed by a factor of up to 5 which saves on storage and reduces transport costs. Sagex is Isover South Africa`s EPS division which manufactures a range of expanded polystyrene products. Sagex offers a choice of lightweight, high compressive strength and water resistant insulation solutions for use in industrial, commercial and domestic applications. Sagex EPS is recyclable and is manufactured using a pentane blowing agent which ensures that the product is CFC and HCFC free. INDOOR AIR QUALITY VOC’s (Volatile Organic Compounds) are a major contributor to interior air pollution and have been linked to various health issues, including headaches, sore eyes, respiratory complaints and the possible impairment of our immune systems. Glasswool has been tested according to ASTM D55116 “Standard Guide for Small-Scale Environmental Chamber Determinations of Organic Emissions from Indoor Material/Products.” Glasswool is well below the minimum emissions level per mg/m2/hour as stipulated by the Green Building Council of South Africa. For more information log onto www.isover.co.za or download our Isover SA app in the app stores

Tel: 0860 ISOVER (476837) Fax: 086 673 1088 www.isover.co.za

PA I NT S & COATI N G S

SAPMA membership grows as support spreads north Membership of the SA Paint Manufacturing Association (SAPMA) is still steadily growing as more and more members of the coatings industry – including subSaharan based producers – realise the benefits of joining.

Membership of the SA Paint Manufacturing Association (SAPMA) is spreading northwards with the association recently having signed up its first Nigerian member.

mong the companies who have recently joined is a Nigerian-based producer, Paint & Coatings Manufacturers (PCMN), which produces both decorative and industrial coatings. It is SAPMA’s first Nigerian member and indicative of the Association’s growing stature in Africa. Neo Paints in Namibia has been a SAPMA member for more than 20 years, and Sofap in Mauritius, and Star Paints in Swaziland, are also members. Deryck Spence, executive director of SAPMA, says applications for SAPMA membership from outside South Africa is becoming common practice as African countries – aware of the major Coatings for Africa 2015 trade show and conference in Johannesburg next year – are keen to benefit from the favourable Rand-Dollar exchange range and so wish to source raw material from SA instead of Europe.

“Like Mauritius, which is taking advantage of the training expertise of SAPMA’s technical programmes, African coatings producers are keen to boost the skills of their workforces by utilising the SAPMA training,” Spence added. New South African manufacturers who have joined the SAPMA fold are Faamz Paints of Amsterdam (near the SA-Swaziland border), which produces decorative and industrial coatings; and Protective Coatings of Pretoria, a decorative coating manufacturer. African Colour Systems of Zimbali, KZN, is a new SAPMA Associate Supplier. The company supplies quality control equipment specific to colour control. Two new paint contractor members are Chregolle Trading of Johannesburg, and Dynamic Spray & Coatings of Pietermaritzburg.

New company registrations Company amendments Director & Shareholder changes Annual Returns submissions Restorations for de-registered companies B-BBEE (SANAS accredited) SARS Tax clearance certiﬁcates SARS company tax registrations

Internet domain registrations & hosting

www.swiftreg.co.za

EASYFLASH

Waterproofing made easy Roll of EasyFlash

colour coating

Seals junctions between walls and roof tiles. All weather durability for 15 years.

aluminium composite butyl backing Enlarged view of EasyFlash

Connection Strips

SIMPLE DIY APPLICATION 1

Measure width to seal the abutment.

Cut EasyFlash and connection strip.

Position EasyFlash, then remove release paper to stick butyl backing on the wall.

Fold EasyFlash along break line.

Remove the release paper on the tile side and stick onto the clean surface.

Secure the Connection Strip to the upper edge of the EasyFlash. Apply weather resistant silicon sealant between wall and strip.

Please note: Surfaces need to be clean and dry before installing.

THE LASTING ROOF SEALING SOLUTION • Easy DIY installation: highly stretchable, mouldable, creped structure (up to 60% stretch) • Sustainable sealing: high tear strength & extreme adhesion (CH bond butyl glue) • 15 years maintenance-free with the Connection Strip application Available in Brown, Black and Terracotta Can be painted with any acrylic based paint.

AVAILABLE AT LEADING HARDWARE STORES Contact Coverland for more information: info.sa@monier.com | Subject line reference: SAR EasyFlash

ROOFS THAT LAST