FCA February 2014 Supplement

Supplement

Roofing, Cladding & Insulation

February 2014 www.fca-magazine.com

THINK CHOICE, THINK STENI Whatever your project, Steni Colour cladding panels offer so many options! As the name suggests, there’s colour – 44 standard ones, plus any from the NCS,RAL or BS systems. And three levels of gloss give you the option to be as creative as you like.

Being Steni, there are other benefits too: like water, UV and impact resistance, time-saving installation and exceptional value. And to top it all, our unique 40-year warranty – so whatever options you choose, they’ll stay looking good.

Steni. Distinctive looks, outstanding value

For enquiries and technical advice call 01978 812 111

www.steni.co.uk Steni UK 1-4 Vauxhall Industrial Estate, Wrexham, Clwyd, Wales, UK LL14 6HA

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In association with

Mixed Media Information Barham Court, Teston, Maidstone, Kent, ME18 5BZ Tel: 01622 232702, Fax: 01622 320020 www.fca-magazine.com www.mixedmediainfo.com

Editor Hannah Frackiewicz hannah@mixedmediainfo.com 01622 232702 Managing Director Sam Ball sam@mixedmediainfo.com 01622 232702 Publication Manager Steve Gull steve@mixedmediainfo.com Account Executives Tom Murray-Scott tom@mixedmediainfo.com Bobby Stoneman bobby@mixedmediainfo.com Studio Manager Chris Lilly chris@mixedmediainfo.com Production Ben Bridgeman ben@mixedmediainfo.com Artworker/Sub-editor David Perry david@mixedmediainfo.com Accounts Simone Jones simone@mixedmediainfo.com

Welcome

...to our Roofing, Cladding & Insulation special

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s storms and heavy rainfall continue to batter the UK, ensuring that buildings are secure and watertight has never been more important. A poorly maintained roof can cause significant damage to a building’s internal structure and can be unsafe to its occupants. December’s London Apollo Theatre incident for instance – when the ceiling collapsed onto the audience injuring 80 people – is said to have been caused by years of neglect and an excess of water following a torrential downpour.

Here, FC&A’s timely and dedicated RCI supplement is the ideal resource to see how incidents such as this can be prevented, using innovation solutions either specified at the construction phase or refurbishment. Inside this issue, we host contributions and case studies from a wealth of industry experts, including Shackerley,VMZINC, Alumasc and Steni.

For more information on our contributors or if you wish to comment on anything featured within this edition, then please do not hesitate to get in touch at the usual address.

Hannah Frackiewicz Hannah Frackiewicz Editor, Future Constructor & Architect

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Terms and Conditons:

Contributions are invited and when not accepted will be returned only if accompanied by a fully stamped and return addressed envelope. No responsibility will be taken for drawings, photographs or literary contributions during transmission or in the editors hands. In the absence of an agreement the copyright of all contributions, literary, photographics or artistic belongs to Mixed Media Information Ltd. The Publisher accepts no responsibility in respect of advertisements appearing in the magazine and the opinions expressed in editorial material or otherwise do not necessarily represent the view of the publisher. The Publisher does not accept any liability of any loss arising from the late appearance or non publication of any advertisement.

Front cover:

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Ventilated cladding:

Shackerley’s Sureclad ceramic granite ventilated cladding has provided a stunning outer envelope for a new £33m landmark university building.

Monumental installation:

3600m2 of VMZINC Composite panels in QUARTZ-ZINC have been used for the underside of Stonehenge’s new visitor centre.

Reliable partner:

Moshe Safdie Architects finds a reliable partner with ELVAL COLOUR after specifying ELVAL COLOUR orofe – coated aluminium coils for roofing systems – for the Marina Bay Resort.

10 Expert refurbishment solutions:

When it comes to roof refurbishment, why take the risk when you can trust your project in the hands of the experts?

12 Designed to perform:

Steni cements its position as a leading provider of cladding systems by upgrading its product warranty from 25 to 40 years on both its Colour and Nature panels.

16 Successful renovation:

Alumasc showcases the company’s vast product capability through the installation of a roof membrane on a retail shopping centre and gutter systems on an iconic landmark.

18 Accurate calculations:

DOW provides three vital considerations when reviewing or making a U-value calculation for an inverted flat roof.

19 A case for composite:

Stuart Burns, Director at Dura Composite takes a look at the benefits that come with specifying timber composite including maintenance, longevity and performance.

The immediate visual aesthetic of the new Stonehenge visitor centre stems from its combination of glass and timber facades. At closer quarters, however, the canopy and its 211 canted steel supports undoubtedly take the eye. See pg 6.

21 Level surfaces:

Install some surface support over all waterproofing membranes with Dectile’s Levato Mono paver system – suitable for both flooring and roofing.

22 Market evolution:

Fraser Maitland, Managing Director of Protan, shares his predictions for the flat roofing market for 2014, including the revolution of single ply roofing.

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www.kempersystem.co.uk

Roofing, Cladding & Insulation Sustainable, Solvent-Free and Odourless Kemperol® Liquid waterproofing and roofing at its very best

As the National Theatre raises the curtain on its 50th anniversary season, Kemper System has ensured that its’ Grade II listed building continues to perform by providing the waterproofing membrane and surfacing for a major roof and balcony refurbishment project.

Kemperol®

Performance without the drama...

• Ideal for roof refurbishment, repair and new build roofing projects.

• Complete solvent free and odourless waterproofing systems available that can be laid whilst the building is operational - Have the work done when you want it or need it.

• Kemperol® is a cold liquid application removing the fire risk of hot works.

• Laid in a single wet-on-wet process to form a totally seamless, durable, fleece reinforced, UV stable, elastomeric waterproofing membrane that cannot delaminate.

• With BBA Approval and a life expectancy in excess of 25 years your roofing budget will never be better spent.

Kemperol Liquid Waterproofing

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For more information visit www.kempersystem.co.uk Request a brochure, quotation, NBS specification, CPD or FREE site survey.

Email enquiries@kempersystem.co.uk or call 01925 445532 to discuss your needs.

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Roofing, Cladding & Insulation

Shackerley system clads University Square Shackerley’s Sureclad ceramic granite ventilated cladding has provided a stunning outer envelope for a new £33m landmark university building in the heart of London’s East End. Wanting to use a premium quality exterior cladding material to give a feeling of permanence and longevity, the architects specified Shackerley’s Sureclad ceramic granite ventilated facades, selecting black ceramic granite panels in highly polished and naturally textured finishes.

Design Architect James Taylor commented: “We envisaged the building as a single rock-like element, carved to create the overall form, expressed with the textured panels, which has then had its most outer faces honed or polished, expressed with the glossy reflective panels. The addition of patinated gold coloured metal panelling acts as a relief to the ceramic granite surfaces, catching the light like flecks of precious stone within a granite rock.”

Shackerley’s Sureclad ventilated facade system has helped to provide a practical, energy efficient outer envelope, allowing for effective external thermal

and acoustic insulation to be installed in the cavity behind the facade. Achieving a BREEAM rating of ‘Excellent’, the building has many other environmentally friendly features including over 700m2 of photovoltaic panels, some of which have been incorporated into the facade elevations, mounted on a Sureclad carrier support system in planarity with the surrounding ceramic granite panels.

James Taylor concluded: “The strong ceramic granite exteriors help to give University Square a calm and confident atmosphere. The building feels like a new landmark, almost civic in scale and character, and the cladding has helped to create this presence in a modern way.”

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niversity Square Stratford provides a new academic and educational hub for students attending Birkbeck, University of London and the University of East London (UEL). It was designed by Make Architects and delivered in a design and build contract by VolkerFitzpatrick in association with AWW Architects.

The brief called for a flexible multifunctional building providing a wide range of facilities under one roof for the two institutions. University Square was to bring together lecture theatres, dance spaces, music rooms, teaching rooms, presentation rooms and open-plan areas in one architecturally striking and coherent building.

Make responded with a bold and expressive design with distinctive angular geometry, comprising clearly defined interlocking blocks which articulate the internal functionality and organisation of space.

8 www.shackerley.com

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* info@shackerley.com

( 0800 783 0391 Images: Above: Shackerley’s Sureclad ventilated facade system has helped to provide a practical, energy efficient outer envelope Left: The architects specified Shackerley’s Sureclad ceramic granite ventilated facades, selecting black ceramic granite panels in highly polished and naturally textured finishes

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Roofing, Cladding & Insulation

The immediate visual aesthetic of the new £27m, 1515m2 Stonehenge visitor centre stems from its combination of glass and timber facades. At closer quarters, however, the 36 x 78.4m canopy and its 211 canted steel supports undoubtedly take the eye.

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600m2 of VMZINC Composite panels in QUARTZ-ZINC have been used for the underside soffit area, the edge of which has an elaborate pattern of perforations. The multi-layered panels are made up of two 0.5 mm thick zinc sheets bonded either side of a mineral-rich polyethylene core.

Though only 4mm thick overall, they offer exceptional smoothness, rigidity and dimensional stability and as a result can be used in lengths of up to 6m.

Australia’s Denton Corker Marshall won the competition to build the centre twice. Their first scheme was dropped when government budget cuts forced abandonment of a plan to build a tunnel to hide the A303. They responded to the World Heritage Site requirements by designing another building of contemporary style at ‘Airman’s Corner’.

A natural palette suited to the rural landscape was a key element of the brief and zinc was chosen for its sustainability, colour retention and selfprotecting patina. The building has been designed to sit lightly in the landscape and to be demonstrably reversible.

Its position in one of the lowest lying areas and remote location, distant from residential development, minimises any visual intrusion in the landscape.

The contemporary steel structure and lightweight framed walls require minimal

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substructure so that, if removed, residual environmental impact will be minimal.

Attention of up to 1,000,000 visitors each year will undoubtedly be drawn to the zinc by the height of the building which, at up to 8m is comparable to the tallest trilithon stones. In addition to being visually distinctive, the canopy is considered to be one of the most notable architectural elements of the design.

The building has been designed to achieve high sustainability targets so local,

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VMZINC gives visitor centre the edge

recyclable and renewable materials were used wherever possible. A sustainable, fuel-efficient approach to heating and cooling greatly reduces energy use and carbon emissions while VMZINC was able to demonstrate that over 90% of material used in construction projects is already being recycled.

Energy consumption in zinc manufacturing is also by far the lowest of any metal facade or roofing system.

Not only can it be rolled at a lower temperature, less than half the energy is used in the manufacturing process compared with copper, stainless steel or aluminium. Air emissions are as little as 0.05mg/m3 while analysis of zinc concentrations in the Rhine, which passes through one of Europe’s areas of greatest industrial intensity, confirms that the balance is well within accepted environmental limits.

Such was the interest in zinc that the pod beneath the roof which provides ticketing and guide facilities is also clad in it. It provides a notable contrast to the timber and glass without suggesting that the divergent materials clash. With its range of colours now extending to blue, green, red and brown the scope it provides has never been greater.

8 www.vmzinc.co.uk

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* vmzinc.uk@umicore.com

( 01992 822288 Images: Above left: The contemporary steel structure and lightweight framed walls require minimal substructure Below: Zinc was chosen for its sustainability, colour retention and self-protecting patina

Roofing, Cladding & Insulation

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With its easy-to-navigate format, users can benefit from a variety of useful tools, such as the magazine’s latest issue, digital archive, suppliers and newsbank. The App is also synced with SBP Library (www.sustainable-buildingproducts.com) providing an essential specification portal. | Bespoke, reader-friendly features tailored to professionals on the move | | Timely industry news delivered at the touch of a button | | Manage print & digital subscriptions | For a faster response visit www.fca-magazine.com or use the free reader enquiry card

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Roofing, Cladding & Insulation

Wave to Singapore’s striking skyline ELVAL COLOUR orofe – coated aluminium coils for roofing systems – were recently used to cover 15,000m2 of roofing construction in one of the most outstanding architectural projects of the decade, Marina Bay Resort.

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he complex of buildings, located in the Bay of Singapore, consists of three hotel towers with 2560 guest rooms, a 120,000m2 convention and exhibition centre, a shopping mall, an art and science museum, two 2000-seat performance theatres, and over 1 million square feet of casino, retail, six restaurants and two floating pavilions. ELVAL COLOUR orofe successfully offers the exciting feeling of a wavy-look roofing; while at the same time certify its safety and ultimate quality.

The three 55-storey towers, designed

by Moshe Safdie Architects, are topped by a 340m long platform containing the

world’s largest rooftop swimming pool, on the roof of the boat-shaped ‘SkyPark’ on top of the three towers, measuring longer than the Eiffel tower laid down.

The Infinity Pool is one of the world’s largest outdoor pools, three times the length of an Olympic pool. Due to the profile of the roof, there are many large steel beams and structures and all this is done 200m above road level.

Reliable partner The Marina Bay Sands Integrated Resort is part of a new development initiative within Singapore’s Marina Bay district.

This $5.7bn resort encompasses nearly

10 million square feet of mixed-use development and features, and is expected to attract over 70,000 visitors daily while generate up to $72m each year.

ELVAL COLOUR is a leading European coated aluminium manufacturer. It produces and sells a range of building envelope products like roofing, facade, rain gutters, corrugated and perforated sheets. More than 90% of sales are exported to a total of 60 countries.

The company’s vision is to be a reliable partner that offers valuable additional services to customers by assisting in product specification and selection to best suit the needs of the project/ application. Customer orientation and dedication accompanies production and product delivery. ELVAL COLOUR is proud to have employees who care about their work and are able to pursue their corporate goals and objectives with great energy and enthusiasm.

A leader in product quality and service, ELVAL COLOUR never seizes to detect customers’ needs, responding effectively and efficiently to them. Continuous R&D on various fields allows steady improvement of technology, quality and environmental standards.

ELVAL COLOUR is a member of the European Coil Coating Association (ECCA), the European Aluminium Association, and is ISO 9001-2008 and ISO 14001-2004 accredited.

8 www.elval-colour.com

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* ecs@elval.vionet.gr

( 01932 331111 Images: Left: ELVAL COLOUR orofe can successfully certify its safety and ultimate quality Above: The Marina Bay Sands Integrated Resort is part of a new development initiative within Singapore’s Marina Bay district

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Roofing, Cladding & Insulation

Do you know the total cost of roof failure? Have you ever considered what would happen if a roof under your care failed?

What is the potential cost to the inhabitants of that building or workplace? And what does it mean for you the specifier?

F

ollowing the recent economic downturn and a slowing in the pace of new build projects, refurbishment has become the only solution for many people – offering a more cost effective option to restore and renew rather than build afresh. But refurbishment can be difficult and provides its own set of complex issues, not least when it comes to roof refurbishment.

Ensuring you choose the right waterproofing solution for your roof is vital, but just as important is the support and knowledge provided by the roofing system manufacturer.

Everyone wants to work with an expert, which is why Sika Sarnafil is the specifier’s system of choice.With over 50 years’ experience in providing high quality single ply membranes and technical guidance, the company has developed an enviable knowledge of roof refurbishment.This has enabled them to develop their tailored Sarnafil Plus package to meet the needs of all refurbishment projects – large and small.

Sarnafil Plus provides complete peace of mind with a full technical service, bespoke detail drawings and wind uplift calculations, as well as regular inspections by the nationwide team of Field Technicians. Before a project begins a member of the Sarnafil Plus team will conduct a comprehensive roof survey to determine which system is most suitable for the project. During the survey a core sample will be taken to assess the current roof construction and the condition of the substrate. During this investigation a photographic record will be made and,

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where deemed appropriate, investigative methods such as core samples and pull out tests will be used to confirm the condition of the existing roof.

A bespoke specification is then produced from the results of the roof survey, including project specific detail drawings, tapered insulation plans and roof layouts (where required), U-Value calculations, wind uplift calculations, condensation risk analysis, and whole life cost evaluations can also be included upon request.

Sika Sarnafil also offers market leading guarantees with a single point of responsibility, ensuring that the client is protected should any problems arise from the failure of the roof system caused by incorrect design, defective materials, or poor workmanship. However the chance of any issues arising is further minimised by the on-going project support offered by the nationwide network of Sika Sarnafil field technicians who regularly inspect the roof and provide a Final Inspection Certificate once the project is complete.

Sika Sarnafil has worked on many prestigious projects around the world, helping to refurbish and restore buildings of significant architectural importance including Norwich Castle and the awardwinning Toffee Factory in Newcastle. More recently a Sika Sarnafil membrane was used on the Principal’s Lodge at Newnham College, part of Cambridge University.

The Principal’s Lodge was built in 1956 and is home to the Principal of the college.

Unfortunately it is renowned for not being the most attractive of buildings, as would befit the head of the college.The roof of

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Expert roof refurbishment solutions

the building is also not the sort of flat roof typically encountered by the Sarnafil Plus team. It’s a duo-pitched ridge with hips and the existing construction was an aluminium profiled metal deck, supported on a timber truss system.

The proposal was to leave the profiled metal deck system in place to ensure the roof remained watertight and encapsulate the whole thing with new SarnaTherm insulation and a Sika Sarnafil waterproofing membrane.This would upgrade the thermal performance of the roof and provide guaranteed waterproof protection.

The specialist refurbishment contractor working on this project – Cambridge Polymer Roofing – had encountered a similar project and suggested a G41018ELF single ply membrane in light grey.

This is an adhered system, which also incorporated Décor Profiles to imitate a standing seam roof. Additional fixings were required to ensure the deck was secure prior to the installation of the insulation and single ply waterproofing membrane.

The result is a fully watertight and thermally upgraded roof, providing guaranteed protection for years to come.

So when it comes to roof refurbishment, why take the risk when you can trust your project in the hands of the experts?

8 www.sarnafil.co.uk

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* sarnafilroofing@uk.sika.com

( 01707 394444

Images Above left: Sika Sarnafil has worked on many prestigious projects around the world Above: With over 50 years’ experience in providing high quality single ply membranes and technical guidance, Sika Sarnafil has developed an enviable knowledge of roof refurbishment

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Roofing, Cladding & Insulation

The MCIAT Professional Assessment

– a new qualifying route What is the MCIAT Professional Assessment?

The MCIAT Professional Assessment is a flexible, rigorous, robust and quality assured qualifying process, based on performance and designed to recognise the diversity of Architectural Technology.

Candidates must provide an in-depth critical analysis clearly summarising their professional experience. This should be a reflective report and should refer to challenges and successes encountered whilst working on projects and how any issues were resolved.

Applicants should also undertake a self-evaluation highlighting their strengths and weaknesses in relation to their area(s) of practice.

The Professional Assessment process is based on four core competencies: • Designing • Managing • Practising • Developing (self)

Who can apply for the MCIAT Professional Assessment?

Any applicant working in or on, for example, academia, general practice, component design, refurbishment, small residential projects, large commercial projects etc within Architectural Technology, should be able to apply their own experience to the Professional Assessment process, but they must hold one of the following membership grades: ACIAT, TCIAT or profile candidate.

Each application will be assessed on its merit. However, each applicant will need to demonstrate a sufficient level of knowledge and understanding and professional competence/experience in relation to their sphere/s of practice and demonstrate to the Institute they can meet the expectations of a Chartered Architectural Technologist, MCIAT.

How much does it cost?

To apply for the Professional Assessment, applicants are required to pay £300 for the assessment of the application and the Professional Assessment Interview.

For further information email our Membership Director, James Banks via james@ciat.org.uk or call us onor+44(0)20 7278 2206 For a faster response visit www.fca-magazine.com use the free reader enquiry card 11

Roofing, Cladding & Insulation

Steni – the solution provider Specialist rainscreen cladding manufacturer Steni UK has marked almost 50 years of manufacturing with the launch of a peerless 40-year functional warranty.

S

teni’s warranty has been extended from 25 years on both its Colour and Nature panels, which allow a modern, dry-trade approach to cladding, and dwarfs the typical guarantees of 10 to 15 years that are offered on traditional render systems.

Steni’s fibreglass reinforced polymer composite panels have been used on a plethora of private and public-sector new-build and renovation projects in the UK, in not just the education and residential sector as shown in the following case studies but also in healthcare, retail, leisure and commercial.

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The company’s Colour panels, which feature a smooth surface of 100% acrylic that is electron beam cured without the use of solvents, are available in 44 standard colours and almost any colour from the NCS-, RAL- or BS-system as well as three gloss levels.

Its Nature panels, which feature a surface of aggregated natural stones from Europe, are available in 17 different natural stone colours and up to five grades in many of these colours.

Both the Colour and Nature panels are designed to perform for more than 60 years and are resistant to weather and climate, impact, moisture and water,

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chemicals, heat and UV light. They also feature excellent fire performance and environment credentials.

Also peerless is Steni’s ability to cut panels to size, a facility which is offered free of charge. The company can also cut to bespoke shapes although this service is charged for. It seems no matter how complex the design or layout of panels, Steni has a surface finish, shade and solution to match.

School gets a new face Steni’s Colour rainscreen panels have helped an infants school achieve a new look and a BREEAM rating into the bargain.

Five colours of Steni’s Colour panels were specified by Solihull Metropolitan Borough Council for the £1m redevelopment of Valley Infants School.

The two-form entry infant school with 240 children on roll was built in 1957 over a single storey over two floor levels using a timber-framed modular system with single-glazed wooden windows and vertical painted timber board-clad uninsulated hollow walls.

As such, it was identified by the council’s primary capital programme (PCP) as being in the highest category and requiring major PCP action in terms of improving the structure and fabric to extend its design life and encouraging community use.

Three programmes of work comprised

Roofing, Cladding & Insulation

Images: Above: Steni’s Colour rainscreen panels have helped an infants school achieve a new look and a BREEAM rating into the bargain Left: Steni’s warranty has been extended from 25 years on both its Colour and Nature panels Below: Colour panels were specified by Glas Architects after two other types of cladding panels failed to meet the Galleywall project’s criteria Far left: Five colours of Steni’s Colour panels were specified by Solihull Metropolitan Borough Council for Valley Infants School

Bridging the gap Steni’s Colour panels were also specified

by Glas Architects for a mixed-use development in south London for their quality and durability in terms of

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modernisation of the whole building external envelope, addition of a new attached 86m² community room and extension of the existing IT classroom from 37m² to 57m². A new 10m² secure entrance lobby was also included.

All the new-build elements were designed to achieve a BREEAM Very good rating, with 60% reduced carbon emissions.

All of the existing timber-clad walls were stripped back to the uninsulated wooden framing for inspection and making good before installation of a vapour control layer, non-combustible board sheathing, bonded dense insulation, and Steni’s rainscreen cladding on a

timber support system.

Architect Marcus Russell of Solihull MBC’s building design group said: “A progression of four harmonious colours was chosen to highlight the identity of the nursery and separate year groups. As a foil to emphasise the colours, set back elements were treated in a light neutral grey to accentuate their appearance as voids against the coloured classroom blocks.

A bright yellow was selected for the nursery while the new community room and reception class is lime green and the extended IT classroom, kitchen and main entrance/admin offices blue. The library and Year 2 classroom are orange.

Parents and neighbours of Valley Infants School who attended a consultation meeting felt the new colours would reflect the vibrancy of the school but expressed concern about graffiti on the cladding panels.

They were advised that “In addition to the aesthetic improvement, the replacement cladding panels would help provide additional insulation and their glossy finish would help limit and reduce graffiti, and if graffiti was to appear it could be wiped off very easily.”

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Roofing, Cladding & Insulation

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while the white and light grey panels are used in two widths in other areas. The slot windows also feature green glass to echo Victorian stained glass.

Meeting the criteria Glas Architects had not used Steni panels before, then local material selection consultancy business Just Facades suggested the Steni Colour range.

Nazar Sayigh, Director of Glas Architects, said: “The Steni panels play a big part in the success of this project.

They achieved the aesthetic we wanted

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longevity and colour fastness.

Three shades of Steni’s Colour panels, in white, light grey and dark grey and a matt finish, were used on all four elevations of Francis Bacon Court on the site of the former Manor Tavern on Galleywall Road.

The panels were specified by Glas Architects after two other types of cladding panels failed to meet the project’s criteria of quality and costeffectiveness.

Some 800m² of the panels were facefixed with colour-coded rivets onto an aluminium sub-frame by specialist sub-contractor Intex Facades for main contractor Hartcrest Properties over four months of the 16-month build.

The six-storey building comprises a ground-floor commercial unit and services for the 10 apartments on the five floors above. These range from two to three bedrooms but all have balconies with patio doors to give views, but not directly overlook, a nature reserve on one side.

The site is owned and was developed

by Family Mosaic Housing. Glas’ brief from the social housing provider was to optimise the tight site while maximising the individual size of the dual-aspect residential units and avoiding overlooking a nature reserve on one side and school on the other.

This they achieved by designing two flank walls with slot windows that are picked out with the dark grey Steni panels in a narrow vertical arrangement,

in terms of colour and finish as well as the contractor’s cost criteria.

“The Colour panels also complied very closely with the performance requirements of the project which demanded durability, long life and colour fastness. The client was very pleased with the effect.”

Glas were particularly interested in the gloss finish to Steni’s Colour panels and hope to be able to use them on future projects.

Intex Facades’ business development manager David Lee said: “We installed the Steni panels generally from the first floor level up to the top storey at sixth floor level. It was a very tight site, with no storage facilities, so the materials had to be unloaded and craned onto the scaffold in their pallets. It was challenging in all respects due to access and programme sequencing.”

8 www.steni.co.uk

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* maurice@steni.co.uk

( 01978 812111 Images: Above left: Both the Colour and Nature panels are designed to perform for more than 60 years and are resistant to weather and climate Below: Three shades of Steni’s Colour panels, in white, light grey and dark grey and a matt finish, were used on all four elevations of Francis Bacon Court

LEVATO MONO - porcelain paver system

Roofing, Cladding & Insulation

Just a few of the benefits at a glance: • ‘Floating floor’ – installation over single ply membranes • Eternal product - zero maintenance required – offering massive over-life savings • Highly abrasion and stain resistant • Highly slip resistant ; R11 and achieved up to +65 wet in the BS pendulum test • Lightweight – 45kgs per m2 • High load bearing and impact resistance • Timber & stone effects ; 40+ finishes available • Ideal for balconies, roof terraces and piazzas, for both commercial & residential use • Completely non porous • Fire & frost proof • Height-adjustable support from 7mm up to 550mm

The Levato Mono porcelain paver system is the pinnacle of external raised flooring technology; enabling the specification of lightweight, slip resistant and attractive raised flooring solutions, combining incredible technical properties with uncompromising aesthetics; making them the ideal choice for commercial and domestic use alike.

t: 0845 2700 696

e: info@thedecktileco.co.uk

www.thedecktileco.co.uk 147 For a faster response visit www.fca-magazine.com or use the free readerOnline enquiry Enquiry card 15

Roofing, Cladding & Insulation

Dual performance with Euroroof Mono

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he re-roofing scheme was part of a rolling programme of refurbishments set to take place at the Meadowhall site over the next 5 to 6 years. The project presented a number of complex roof details which required a versatile waterproofing solution. 8500m2 of Euroroof Mono was installed by BBR Roofing of Liverpool, following its specification by real estate consultants Colliers International, who chose the system due to its flexibility and ease of installation.

Euroroof Mono offers a single layer waterproofing solution for both new construction and refurbishment projects, offering all the benefits of high performance bituminous membranes, combined with quick and safe methods of installation.

The system is fully warranted with a typical life expectancy in excess of 20 years. It has been tested rigorously against wind uplift in accordance with BS 63992:1997 and offers high tensile strength and pliability, along with excellent resistance to

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“We’ve worked with Alumasc for many years and find their help and advice invaluable, especially when it comes to factors such as calculations for rainwater flow and thermal performance.”

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The landmark roof at Meadowhall Shopping Centre in Sheffield is the latest to showcase Alumasc’s innovative Euroroof Mono Flat Roof Membrane. puncture and UV degradation. At Meadowhall, the refurbishment installation was subject to a number of challenges, the most significant being that the area being re-roofed covered a food court hosting over 50 food providers.

Lindsay Bell, Managing Director at BBR Roofing, explains: “Each food retailer has its own H&V units feeding out onto the roof, which could not be disturbed and had to be fully operational during the roofing process. The Euroroof Mono system was ideal for overcoming this problem as it is flexible, with quick and easy installation.

“An additional benefit is that Euroroof Mono is a mineral product making it less slippery than the previous PVC roofing in bad weather. In icy conditions, the roof was often inaccessible to maintenance workers, which was far from ideal given that around 30 contractors per week need access. Euroroof Mono will help with this issue as it is better suited to poor weather conditions and only requires minimal maintenance.

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8 www.alumascroofing.co.uk * info@alumasc-exteriors.co.uk

( 0808 100 2008

148 Images:

Above left: Euroroof Mono offers a single layer waterproofing solution for both new construction and refurbishment projects Above: 8500m2 of Euroroof Mono was installed by BBR Roofing of Liverpool

Roofing, Cladding & Insulation

Alumasc recreates history for Airbus Alumasc Aqualine Gutter systems have played a key role in the major restoration of Pegasus House, the former HQ of the Bristol Aeroplane Company.

P

egasus House, is an iconic landmark of historical and international importance, boasting a lavish Art Deco style that reflected the significance of the city’s expanding aircraft industry when it was built in 1936. The Grade II Listed building had lain empty for 20 years but has now been completely renovated by current owner, Airbus, who worked closely with the local council and Architect Capita Symonds to ensure a sympathetic restoration.

The aim was to replace as many of the building’s original features as possible and attention to detail was vital. The original components of the historic rainwater system were beyond repair and had to be replaced with new products which would respect the authenticity of the project.

Alumasc’s Aqualine gutters were specified by the Architect who gained approval for the system from English Heritage.

Maximum capacity Around 215m of Aqualine Box was installed by Massey Cladding Solutions of Bristol, to all areas of the five-storey building. Aqualine Box is a robust and fully engineered box section gutter which is designed for dry jointing on site. The system is lightweight and durable, with minimal maintenance requirements.

Aqualine proved ideal for this project as it replicated the original very closely and met the requirement for maximum capacity gutters.

The designers chose a special polyester powder coated matt paint finish, which due to its popularity, has now been added

as a standard colour option by Alumasc.

Gary Blakeway of Massey Cladding Solutions, commented: “The aim was to get as close a match to the original guttering as possible. Alumasc’s solution was almost identical and it was approved

by English Heritage. The installation went very smoothly, with no problems and it looks superb.”

Pegasus House is part of the 12-acre Airbus aerospace park and will bring 2700 engineers and designers together when work is finished on the site. Main Contractors were Miller Construction.

8 www.alumascrainwater.co.uk * info@alumasc-exteriors.co.uk

( 0808 100 2008

149 Images:

Above: Around 215m of Aqualine Box was installed by Massey Cladding Solutions of Bristol, to all areas of the fivestorey building Left: Alumasc’s Aqualine gutters were specified for Pegasus House – an iconic landmark of historical and international importance

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Roofing, Cladding & Insulation

When calculating U-values, we need to assess the individual materials which make up the construction element

The rules of calculating U-values Reviewing or making a U-value calculation for an inverted flat roof? Then you should bear these three vital considerations in mind according to Dr Steve Johnson, Technical Manager for STYROFOAM and XENERGY insulation manufacturer, Dow Building Solutions:

T

he inverted flat roof is a building element with many unique aspects, which must be tackled at the outset in order to avoid errors when making U-value calculations.

Water vapour movement as well as heat transfer should be calculated, and in addition condensation issues need to be satisfactorily addressed if a robust design solution is going to be achieved. Let’s take each issue in turn.

Location, Location, Location Most people understand that two identical buildings, with identical U-values, would not deliver equal energy efficiency performance if built in different locations, due to differences in local climates. But you wouldn’t expect this to affect a U-value calculation itself – or would you?

Inverted flat roof construction is simple in principle; just place the insulation above the waterproofing layer rather than below it, as would occur in traditional, warm roof construction. Interchanging the position

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of the waterproofing and insulation layers brings numerous advantages, but also introduces an additional mechanism for heat loss: rainwater can flow beneath the insulation boards and remove heat directly from the building fabric, before finally running off the roof and down the rainwater drainage outlet.

This effect is known as Rainwater Cooling, and it must be addressed when we do a U-value calculation. So how do we do that? First, calculate the U-value without taking it into account, and then add a correction (known as Delta U) to obtain the final U-value.

Design and declared lambda values When calculating U-values, we need to assess the individual materials which make up the construction element and know their respective thermal resistances, which can be derived from their thermal conductivity and thickness. If proprietary materials are used, a manufacturer should be able to provide relevant and – more importantly – accurate information for the calculation. In other circumstances, it may be acceptable to use generic information for the materials.

All insulation products have some degree of intrinsic variability in thermal conductivity. European Products Standards therefore take thermal test results and subject them to statistical analysis to create a level playing field.

This improves the robustness of thermal conductivities used in calculations, and helps ensure that a consistent approach

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Roof build up The optimum location for insulation is the outside of the building structure: this minimises thermal issues and helps to ensure that the dew point is on the outside of the building.

The possibility of interstitial condensation on an inverted flat roof is further diminished, as the waterproofing layer is on the warm side of the insulation boards and thereby acts as an efficient vapour control layer. Surface condensation will also present a low risk, as the insulation boards maintain the roof’s waterproofing close to the building’s internal temperature.

Nevertheless, while condensation risks are low, they are not zero, and we need to consider what other physical mechanisms may contribute. As already outlined, rainwater is able to flow beneath the insulation boards, removing heat from the roof structure. This results in a sudden drop in temperature and can lead to condensation.

There are no hard and fast rules as to how much thermal insulation can be accommodated within a building before problems with condensation effects emerge. However, it is generally recognised that for an inverted flat roof design to perform effectively, the overwhelming majority of the insulation must be placed outside of the building and above the waterproofing layer.

In summary, yes, there is more than meets the eye when calculating U-values for inverted flat roof systems and bearing issues such as condensation in mind.

However, guidance is available to help ensure we all get it right – and help protect the reputation of the building industry as a whole.”

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Image:

is used throughout the entire process. It also takes mechanisms such as aging into account.

This analysis delivers a so-called “declared” lambda value in accordance with the relevant European norm for the insulation being considered. For extruded polystyrene (XPS) such as STYROFOAM this norm is BS EN 13164.

8 www.styrofoam.co.uk * fkltech@dow.com

( 08707 104 553

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Roofing, Cladding & Insulation

Realising the value of timber composite Stuart Burns, Director at Dura Composites, looks at the benefits of composite over natural timber when it comes to cladding.

Eco-friendly Dura Cladding in Cedar colour is the main feature at Eco Friendly Lanswood park, Essex. Dura Cladding will retain around 90% of its colour throughout its 25 year life expectancy at the new Severn Trent offices in Shrewsbury.

Timber composite cladding still represents a tiny segment of the overall cladding market, and UK suppliers are few

and far between, but it seems key decision makers are finally realising its true value.

One of the main points to note for the eco-minded is that a quality timber composite product like Dura Cladding can be just as green as wood, if not more.

A report from CERAM UK confirmed that the product meets the highest sustainability specifications. It is made

of 87% recycled materials, and recently Dura became the first timber composite supplier to become FSC 100% certified.

Whereas traditional wood planks require regular painting or staining to preserve their natural beauty and protect them, UV inhibitors can be added to a quality timber composite at the point of manufacture to protect against the elements.Therefore, the only maintenance required would be cleaning, just like any other outdoor product.

It was the colour stability that attracted Darin Shainkly, Managing Director of Lanswood, when he was deciding on materials for the Lanswoodpark development near Colchester.

Long term colour stability was also a big factor in the decision to specify the same product at Edgbaston Priory Club – one of the country’s most prestigious private leisure clubs.

8 www.duracomposites.com * info@duracomposites.com 151 ( 01255 423601

Online Enquiry 152

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Online Enquiry 153

Roofing, Cladding & Insulation

P B S SBP RY A R LIB

sustainable-buildingproducts.com sustainable-buildingpr sustainable-buildingproducts.com

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sustainable-buildingproducts.com Your essential new reference for sustainable building product information web | mobile | tablet

Roofing, Cladding & Insulation

Benefits at a glance • ‘Floating floor’ – installation over single ply membranes • Eternal product – zero maintenance required – offering massive over-life savings • Highly abrasion and stain resistant • Highly slip resistant; R11 and achieved up to +65 wet in the BS pendulum test • Lightweight – 45kgs per m2 • High load bearing and impact resistance • Timber & stone effects; 40+ finishes available • Ideal for balconies, roof terraces and piazzas, for both commercial & residential use • Completely non porous

Access all areas

• Fire & frost proof • Height-adjustable support from 7mm up to 550mm

The Levato Mono paver system is the pinnacle of external raised flooring technology; enabling architects to specify lightweight, slip resistant and attractive raised flooring solutions, which combine incredible technical properties with uncompromised aesthetics, making them the ideal choice for commercial and domestic use alike.

H

igh load and impact resistance; extreme wear and scratch resistance; frost and fireproof; colour fast and extremely resistant to staining; mould and algae growth – these qualities ensure an extremely low maintenance and trouble free flooring solution.

Matching internal tiling options are also available allowing for seamless visual transition between internal and external spaces.

Available in 40+ plus colours and finishes in both ultra-realistic timber and stone-effect pavers, combining 3D printing and mould making technology, to reproduce identical copies of natural materials and with up to 30 prints available for each paver range, once laid, the eye is unable to discern any replicated pattern allowing for a completely natural looking surface.

Recently specified for external dining areas at London Zoo as well as for the new Portico Terrace at the Theatre Royal Drury Lane; one of the company’s Levato Mono sandstone effect paver ranges was considered so similar to natural sandstone material, that is was sanctioned for use on this grade 1 listed building by English Heritage.

Used in conjunction with height adjustable fixed head or self-levelling pedestals or fixed height paver support pads, the Levato Mono system makes it possible to create perfectly level surfaces over uneven sub-surfaces. Ideal for installation over all waterproof membranes Decktile’s support systems cover height ranges from 7mm to 550mm and incorporate a patented selflevelling slope correction facility with the convenience of height adjustment after the pavers are installed.

8 www.thedecktileco.co.uk * info@thedecktileco.co.uk

( 0845 2700 696

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Images: Above left: The Levato Mono system makes it possible to create perfectly level surfaces over uneven sub-surfaces Above: Dectile’s support systems cover height ranges from 7mm to 550mm and incorporate a patented self-levelling slope correction facility

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21

Roofing, Cladding & Insulation

Changing single ply for the better? Fraser Maitland, Managing Director of Protan, looks at the flat roofing market for 2014.

M

y prediction for 2014?

Single ply roofing will see the beginning of a revolution in the way roofs are constructed, a revolution that will prompt greater profit returns and forward thinkers to question why they ever did it any other way!

And I further predict that as a result, we will see the single ply market grow beyond its current 7.5+million metres per annum. The UK construction industry is showing signs of growth already, in new build and refurbishment, with the Office for National Statistics reporting new orders increasing over 30% on the same period 2012. We are already seeing the start of a situation where that growth means demand is outstripping supply. If the weather is true to prediction, and becomes one of the worst for decades, the refurbishment/repair market will grow beyond anticipation: roofs are the subject of more cold weather insurance claims than any other element – even burst pipes.

That will inevitably impact to some degree on single ply roofing, but I also believe we will see changes in techniques.

Those contractors that have survived the past few years have done so by cleansing inefficient working practice.

Greater efficiency creates a growth in profitability. Part of that efficiency comes from utilisation of skilled labour: most manufacturers now run training schools to educate roofers in the most efficient way to construct the roof and lay the material.

The Single Ply Roofing Association (SPRA) has, for some time, had its Design Guide to lay down best practice. These combined mean the job is completed, better, faster, and with reduced risk of defects.

However, ‘you get what you pay for’: a

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quality product and quality labour are not necessarily the cheapest, but cheap is not necessarily best. Material bought supermarket-style “off the shelf” may not be the right one for the job, and is often laid by less skilled labour. A face-value cost-saving actually becomes the more expensive option, as it takes longer to fit, can be more prone to installation issues, and may require subsequent ‘snagging’ or even a complete strip and refit.

One of the biggest skill issues single ply roofing faces is on-site welding. It is time consuming, subject to the vagaries of quality of workmanship, and the one single biggest area for potential weakness, defects, and leaks. It is also a factor rarely properly costed into a project: estimators cost a roof on m2, but we don’t weld m2, but linear metres, so, often, the cost is either not factored in, or inaccurate.

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Pure fabrication

one customer specified smaller rolls for perceived ease of handling; now the company orders larger rolls because they cover the roof more quickly, further accelerating roof construction, and demonstrating the practicality of my point about efficient working practice.

In addition, because the membrane has been produced in such a controlled environment, it fits precisely. Site wastage is minimised, enhancing efficiency and profitability. Penetration details – as diverse as vents, rooflights, ‘Mansafe’ latches, can be similarly factory produced, further reducing labour and workmanship issues on site.

By now, you are probably thinking who is this guy to tell us? Who is Protan? I will honestly admit, many specifiers and roofing contractors may not even have heard of the company: it only has a small market share. But by this time next year, that position will have changed. Protan is aiming to become a major player in the UK market, mirroring its success throughout Europe: Protan employs over 800 people, and produces over 11.5million m2 of PVC membrane. In every other European country in which we operate, we are the dominant force, with on average 40% market share. It is a global company, true to the ethos of local supply, giving added value to customers.

Reducing on-site welding Wouldn’t it be better if on-site welding were reduced to a minimum (it can never be completely eliminated as the roof has to be fixed somehow!)? That situation is now possible, with the advent of factorywelded single ply systems. Research shows that on a typical 10,000m2 roof, if factorywelding was used, on-site welding could be reduced by 70% – equivalent to 60 hours, or over a week’s labour. Potential defects are reduced pro-rata. The complexities of estimating a curving roof are massively simplified.Yet factory-welded single ply material is cost-comparable to non-welded.

There are other benefits too. Using bespoke software, the welded membrane plan is designed in the factory, and delivered to site in rolls to customer requirement. As an interesting aside,

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8 www.protan.co.uk * customercare@protan.co.uk

( 01925 658001

155 Images:

Above left: Euroroof Mono offers a single layer waterproofing solution for both new construction and refurbishment projects Above: 8500m2 of Euroroof Mono was installed by BBR Roofing of Liverpool

Online Enquiry 156

Roofing, Cladding & Insulation

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Online Enquiry 157

WHAT IS THE TOTAL COST OF ROOF FAILURE? Roof refurbishment is about more than just ‘fixing’ the leaks. Have you ever considered what would happen if that roof failed? What is the potential cost to the inhabitants of that building or workplace? And what does it mean for you as the specifier?

Everyone wants to work with an expert, which is why Sika Sarnafil is the specifier’s system of choice.

We’ve been providing expert guidance and single ply roofing membranes for over 50 years.

During that time we’ve developed an enviable knowledge of roof refurbishment and tailored our Sarnafil Plus package to meet the needs of all projects - large and small. That includes ensuring complete peace of mind with a full technical service, bespoke detail drawings, wind uplift calculations, and regular installation inspections by our technical experts. Each roof project also begins with a comprehensive condition survey, allowing us to provide a single point guarantee covering against design, materials, installation and contractor insolvency.* Why take the risk when you can trust your project in the hands of the experts? *Contact us to find out more or for a complimentary roof survey.

For further details: 01707 363905 www.sarnafilplus.co.uk