56 RCI 0514

RCI May 2014

INSULATION SIPs solution SIPs are easily capable of delivering U-Values of 0.19 W/m2K or better. The factory engineered joints ensure high levels of insulation continuity at junctions, allowing excellent psi-values to be achieved. SIPs can also avoid problems associated with other construction techniques such as air loss through poorly sealed openings or at floor zones through masonry cavity walls, and their inherent jointing arrangement can form an effective air seal, with air-leakage rates as low as 1m³/hour/m² at 50 Pa. At these levels of airtightness, it is essential that a MVHR (mechanical ventilation with heat recovery) system is also installed to ensure a constant supply of fresh air. MVHR units are a standard part of high performance houses, such as those designed to meet the Passivhaus standard, and help to further minimise heating demand by warming incoming fresh air using the warm, stale out-going air. SIPs also have a lower thermal mass when compared with other construction types such as concrete, brick or stone. Low thermal mass is considered beneficial within the SAP 2012 energy model calculations as it means that the indoor environment will warm faster in response to heating systems. Whilst the excellent fabric performance that SIPs can provide help to retain most of this heat within the building envelope. Case study The flagship development at Hanham Hall in Gloucestershire is just one example of how SIPs can be used to quickly and efficiently meet and exceed 056 MAY 2014 RCIMAG.COM the new Part L requirements. The estate comprises 185 dwellings, including 61 affordable homes, and the Kingspan TEK Building System was used for both the walls and roofs of the properties. In a typical external wall construction, a vapour barrier was stapled to the external face of the Kingspan TEK Building System panels followed by timber cladding fixed on battens. 30mm thick Kingspan Thermawall TW55 was installed internally, helping to further reduce both heat loss and thermal bridging, followed with a service cavity and a layer of plasterboard. A similar internal build-up was also used for the roofs with 80mm Kingspan Thermawall TW55 installed internally. The constructions achieved outstanding thermal performance, with typical roof and wall U-values of 0.11 Wm2/K and 0.15 Wm2/K respectively, whilst maintaining air leakage rates below the target maximum of 1.5 m3/m2/hr @50 Pa. Moving forward Whatever the exact requirements of the domestic and non-domestic zero carbon regulations are, there is no question that it will involve major changes for the construction industry, particularly with the limited aggregate uplifts in ADL2013 (6% for domestic, 9% for non-domestic). SIPs can achieve virtually out of the box compliance with the current regulations and have consistently shown over the past few years that they can help projects of all sizes to meet the most demanding standards for building performance. www.kingspantek.co.uk The Kingspan TEK Building System has been installed across the “zero carbon” Hanham Hall development, helping to minimise heat loss and air-leakage without compromising internal living space SURPLUS INSULATION We have had surplus insulation off a number of companies over the years, which include: Recticel Kingspan Dow Superglass SIG ENCON Builders Roofers ARE ALL PEOPLE WHO HAVE SAVED MONEY BY CONTACTING US So what have you got that we can help you with? STOP! Don’t skip it, CALL US! Contact us on Email: cait@surplusinsulation.co.uk Tel: 07551 156 284 ROOF IN A BOX Quality, Reliable, Value ROOF IN A BOX are collections of high quality products and accessories that are essential for any roofing project. Swiss made, approved by major Single Ply Membrane manufacturers: Sika / Sarnafil / Trocal, IKO, Icopal, Carlisle, Firestone, Protan. PREMIUM KIT All accessories shown PLUS 1 x Rion 110v Heat Gun DIGITAL KIT All accessories shown PLUS 1 x Digital 110v Heat Gun Unit J, Woodrow Way, Fairhills Industrial Estate, Irlam, M44 6ZQ Tel: 0161 777 9009 Email: sales@lancastria-group.co.uk www.lancastria-group.co.uk


RCI May 2014
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