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EXTERNAL ENVELOPE
accommodation, care homes, sheltered housing, hospitals, and dormitories. While metal is largely unaffected, it’s the substrate the metal cladding is attached to which is where many of the changes will impact how products are specified. For example, on Barchester Street, a scheme for 115 new affordable homes in Poplar, east London, SIG Design and Technology worked with the project team to develop a fire compliant solution for the zinc-clad facades.
Aluminium combines the benefits of being lightweight and easy to work with
The solution utilised a steel frame system and comprised a cement particle backing board, mineral wool insulation, aluminium rails to support the steel sheeting (in place of plywood) followed by a breather membrane. This was then covered with angled zinc standing seam cladding. The above paragraphs highlight the importance of understanding the new rules relating to fire and how it affects the materials used in a roofing or cladding application. While the temptation might be to reuse an existing specification, it’s now critical to check that each component is fit for purpose and that the system as a whole satisfies the requirements of the Building Regulations.
Resapol supply Mapei Purtop Easy for roof renovation
I
n August 2022 Steve Harrison, Resapol’s northern divisional sales manager, visited a site to recommend products for an extensive roof renovation in Leigh, Greater Manchester.
It was identified during the
initial site visit that a number of criteria needed to be met; a high performance, fast- track system that offered excellent adhesion and easy application was required.
The Resapol Leigh depot technical team immediately thought of Mapei as the ideal manufacturer. Their range of waterproofing membranes stand out as really versatile and typically come as ‘ready-to-use’. They are also rigorously tested and backed up by extensive research and development, so they provide a guarantee of durability, quality and environmental sustainability for the construction’s themselves.
After conducting a further site visit with Mapei’s Phil Graham, the client chose to go ahead with Mapei’s Purtop Easy roofing system. a one-component,
Purtop Easy is elastic polyurethane
membrane with a coloured finish typically utilised for waterproofing both new and existing balconies,
terraces, roofs and
areas with pedestrian access. It can be applied on concrete, cementitious screeds, ceramic, fibre-cement boards,
old bituminous
membranes and metal. Highly elastic and exceptionally durable, the membrane is
ADF04_Resapol_External Envelope -
Roofing_HPAdv.indd 1
WWW.ARCHITECTSDATAFILE.CO.UK
equally easy to apply either horizontally or vertically using a brush, roller or trowel. Once applied, it guarantees substrates are fully impermeable and resistant to standing water,
root penetration, foot traffic and temperatures from -40°c to +80°c. Once specified Resapol arranged fast delivery, direct to site where Elite Construction & Property Services Group successfully completed the project within just three days.
0800 083 194
www.resapol.com 06/04/2023 12:03 ADF APRIL 2023
Use your supply chain The information to help specifiers and architects is out there and readily available from manufacturers, but finding and making sense of it is a task in itself. It’s here where early engagement with the supply chain can make overcoming these challenges easier. Distributors can leverage their relationships with manufacturers to ensure the information needed is readily available, removing the pain of searching. Some companies go one step further in not only supplying complete cladding solutions but offering technical and regulation specialists that are there to support customers in developing a compliant solution. It is also worth looking at whether system component warranties are offered by your supplier. This is critical as while individual warranties will likely be in place for single products, the focus is on how these all perform as a system. Therefore, a system approach to solutions and warranties is the best way to ensure peace of mind for you and the building owner.
Simon Walker is category manager at SIG Design and Technology – Hard Metals
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