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RCI Feb 2018

Zink FLAT ROOFING & WATERPROOFING SYSTEMS 01992 801927 www.almhm.co.uk REACH for sustainability New adhesive for cold winter days Eight years after being put on the ‘At Risk’ register by English Heritage, the Terry’s Chocolate Factory has been given a new lease of life, following extensive refurbishment. The 1926, Grade II listed building now starts a new chapter as a care village owned by Springfield Healthcare. Once home to famous brands such as Chocolate Orange, the factory and offices closed in 2005, and fell into disrepair over the subsequent decade. Eventually the building, which is part of a 27-acre site, was acquired by Henry Boot Developments for conversion. The renovations included a full roof refurbishment that was undertaken by Hull-based roofing contractor L.A. Hall, using a Sika Sarnafil single ply system. One of the key focuses of the work was to preserve and retain the art 074 FEBRUARY 2018 RCIMAG.COM deco features of the building, while increasing its lifespan. A vital element of the repairs was the work on the existing flat and slate roof areas that were in a very poor state, and a roof for the new additional floor of the building. Principal contractor, Simpson (York), brought L.A. Hall on board to complete the roofing works, which comprised a number of disciplines, including heritage Westmorland slating, single ply, zinc cladding and leadwork. L.A. Hall suggested using a Sika Sarnafil system for the flat roof areas, as it matched the client’s requirements for longevity and sustainability, and is the company’s preferred membrane choice. The project was said to be complex, due to the multiple roof areas and detailing. To begin, the existing slating on the central north light roof slopes, which were remaining in place as part of the new scheme, were re-covered using a fully adhered Sika Sarnafil system including G410-EL membrane in Lead Grey. In addition to the existing roof areas, an extra floor to the building was constructed around the north lights. Its steep slated mansard-type external elevation included approximately 60 dormer windows, which required zinc on all the vertical faces and Sarnafil on the tops. The flat roof area of the extension was then also covered in the Sarnafil system, along with 140m of parapet guttering detailing, and a new roof terrace area. Nigel Drysdale, technical advisor at Sika Sarnafil, said: “We had a great number of details to consider in order to preserve the original look of the building. For example, the architect and conservation officer required a timber mop roll detail to the perimeter of the main roof and the dormers. So all the parties worked closely to achieve a practical and aesthetic solution, which involved creating detailed life-sized models of key elements. This collaborative and applied approach gave the conservation officer confidence that the detailing was sympathetic to the building’s heritage and that’s what we eventually installed.” All members on the team reportedly agree that the newly refurbished roof will defend this iconic building from the elements for many years to come. http://gbr.sarnafil.sika.com Sika Sarnafil and the chocolate factory Winter months are always challenging in roofing. It’s not just the manpower that gets affected by cold weather, issues also arise with temperature sensitive materials such as adhesives. Generally both PU adhesives and contact adhesives are advised not to be used if the temperature is below 5° C, leaving the roofing contractor with no choice other than using mechanical fixings. However, a mechanically fixed roofing system might not always be the best solution for the project specification. Identifying the gap in the market, IKO Polymeric has launched a brand new adhesive for cold winter days. IKOpro PUMA Zero adhesive can be applied at temperatures as low as 0°C and used for adhering insulation boards or fleece-backed single ply membranes. The adhesive contains no solvents and cures in minutes, making the installation quick and easy for the roofing contractor, while also providing significant labour savings. Richard Walgate, managing director at Robseal Roofing, said: “We used IKOpro PUMA Adhesive as a trial and the feedback from the site team was very positive. We found it easier to apply than the other adhesives, and liked the fact that we could use it for bonding both the membrane and insulation boards. What’s even better is we could still carry on working at temperatures where we would normally struggle.” www.ikopolymeric.com Independently verified by Underwriters Laboratories, Alumasc’s Hydrotech MM6125 Hot Melt is said to contain 30% postconsumer recycled content, making it the choice of responsible professionals working in an increasingly sustainable environment. Along with the basic bituminous element, Hydrotech is a combination of recycled materials including rubber crumb from used tyres, process oil and inert fillers – products typically disposed of via landfill. Hydrotech is also fully compliant with the REACH legislation (Registration, Evaluation, Authorisation and Restriction of Chemicals), which originated as a mandatory regulation of the European Union, and was implemented to improve the protection of human health and the environment from the risks that can be posed by some materials. According to Alumasc, not only does Hydrotech contain sustainable raw materials, the primary energy source used in its manufacture is hydro-electric power. These manufacturing procedures are independently audited to the ISO9001 Quality Management Standard, and Hydrotech – which has over 50 years of proven zero project failures worldwide on projects of all types and sizes – is imported under Alumasc’s ISO14001 Environmental Management system. This is said to ensure that upstream production processes are monitored for their environmental impact and careful consideration is given to the packaging, transport and disposal, in order to deliver as sustainable a construction product as possible. www.alumascroofing.co.uk Copper Stainless


RCI Feb 2018
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