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Building Products April 2017

GENERAL PRODUCTS Too cool for school Eight schools that make up the Midlands batch of the Priority Schools Building Programme (PSBP) will be delivered ‘state of the art’ facilities thanks to Gilberts roof mounted hybrid Mistrale Fusion System (MFS-VN). Carillion secured the contract to design, construct and maintain the schools for the Education Funding Agency (EFA), using M&E consultant Aecom and contractor Dodd Group to address the building services. The MFS-VN has been integrated into specially designed roof turrets, to provide stack ventilation to the open areas of each of the schools. According to Gatic Civil Drainage, independent testing has revealed that its Filcoten grated channel drainage system provides marketleading levels of installed strength and stability. Filcoten is manufactured from the High Performance Concrete which Gatic Civil Drainage say is, in comparison with other commonly used material options for grated systems, five times stronger, significantly improving the installed channel’s resilience to traffic loading, ground movement and thermal cycling. Simon Bradbeer, R&D Director at Gatic Civil Drainage, said: “From our own in-house testing, we understood that Filcoten has many advantages - not least in how it’s Each turret comprises two MFS128 fusion units, as required by current Department of Education and PBSP guidelines, topped with mechanically operated intake and extract louvres, with airflow regulated by integrated dampers. Gilberts MFS is available in standard through-wall and through-window solution, with a VN turret version suitable for roof mounting. The single-sided through-structure unit provides a one box, stand-alone solution, requiring no additional ductwork or plant. www.gilbertsblackpool.com handled and how it performs once installed. These independent results have not only substantiated our findings but also furthered our understanding of this breakthrough material which delivers significant cost and performance benefits to specifiers, installers and stockists.” Typically, grated channel systems are used in shallow invert environments where the surface area exposed to the bedding concrete is relatively low. As a result, the installed performance is greatly influenced by the level of adhesion between the channel wall and the surrounding concrete. This can be improved by physically profiling the channel with cut-outs and faceting, but it is the strength of the chemical bond that is the principle characteristic in determining durability and longevity. Simon added: “For specifiers and contractors, the fact that weather conditions don’t impact on the stability of the finished run adds a further level of confidence in the product.” Gatic Civil Drainage say the product is seventy percent lighter than conventional concrete; stronger, more durable and more environmentally friendly than resin and fibre reinforced concretes, Filcoten’s benefits have allowed engineers to exploit the full potential of High Performance Concrete across all load class drainage applications. Filcoten is 100% recyclable: no plastic resins, hardening agents, solvents or releasing agents used in any manufacturing process. www.gatic.com 46 BUILDING PRODUCTS | APRIL 2017 Significant thermal performance improvements for Dorset cliff top house Airtightness performance qualities of the Wraptite-SA from the A. Proctor Group have been employed in a project on a cliff top house in Poole, Dorset. Local developer Portus Homes selected Wraptite-SA, which combines the important properties of vapour permeability and airtightness in one self-adhering membrane. Wraptite-SA, the selfadhering vapour permeable air barrier certified by the BBA, was applied directly to the concrete walls behind the Grespania Coverlam porcelain external cladding. The introduction of Wraptite-SA in the construction made a significant contribution to the building’s thermal performance by preventing lateral air movement. Matt Gorvin, Director at Portus Homes explained, “I had successfully worked with Roofshield vapour and air permeable pitched roof underlay from the A. Proctor Group on previous projects, and wanted a airtight, vapour permeable membrane, which could be used directly onto the blockwork walls. Wraptite-SA was the perfect choice in that it is self-adhesive, and could be applied directly over the concrete.” A key benefit of the system is that Wraptite-SA’s high vapour permeability allows the substrate beneath to dry quickly and moisture vapour to escape. This ensures good indoor air quality and reduces the likelihood of mould, mildew, condensation, timber distortion and metal corrosion. www.proctorgroup.com Independent test proves strength and stability


Building Products April 2017
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