68 RCI 0714

RCI JULY 2014

FLAT ROOFING Zink Copper Stainless 01992 801927 www.almhm.co.uk The new Sika Sarnafil roof at Newnham College Vacuum roofing technology protects value Protan says the new £16m Splash Waterworld at Butlins Skegness is now using state-of-the-art roofing technology to protect its value. Almost entirely under cover, the refurbished, remodelled and extended waterpark is roofed with 2,000m² of the PROVAC vacuum single ply membrane system, as well as a Protan fully adhered exposed roof complete with Latchways Mansafe Protan Constant Force fall protection safety system. William Bird, from the project’s roofing installer Roofdec, said: “The combination of Protan single ply membranes provided good roof performance across the spectrum of the building’s usage, with one guarantee covering all the new roofs. It also reduced significantly the number of mechanical fixings, accelerating installation time, an giving and end result that was more appealing to the eye. “PROVAC sat well with the roofing specification of a PIR insulated roof panel. Protan’s GX fleece-backed fully adhered roofing membrane is purpose designed for buildings with high levels of humidity and / or which are expected to encounter strong wind uplift.” PROVAC works by loose-laying of Protan SE membrane on the roof, fastening only around the perimeters and penetrations. Strategically located vents within the design act as pressure release valves. The stronger the wind forces, the better the system works. Protan GX’s fleece backing further enhances insulation whilst giving an enhanced bond to the roof structure below. www.protan.co.uk Major roof upgrade The Principal’s Lodge at the University of Cambridge’s Newnham College has received a major upgrade of its existing corrugated aluminium roof and now includes 500m² of Sika Sarnafil single ply roofing system. The original roof was a virtually uninsulated, industrial style aluminium roof so at the client’s request, Cambridge Polymer Roofing installed a Sika Sarnafil G410-18ELF single ply membrane in Light Grey. This is an adhered system, which also incorporated Décor Profiles to imitate a standing seam roof. The specification required attachment of the new roofing system to the existing metal deck, meaning additional fixings were installed to ensure the deck was secure prior to the SarnaTherm installation being mechanically fastened on top. As the profiled deck was aluminium and therefore soft, normal fasteners could not be used and special fixings, called peel rivets, were utilised instead. Once the insulation was attached the Sika Sarnafil membrane was then installed to give a waterproof finish and completely encapsulate the existing roof. Steve Wale of Cambridge Polymer Roofing said: “The greatest difficulty was in changing the profiled aluminium details to Sika Sarnafil details and still maintaining the aesthetics. Additionally, the low pull out strengths of the aluminium deck necessitated alternative fixings by way of the peel rivets.” Newnham College’s Andy Kite said: “Nothing was an issue for us although it is a slightly strange design having an inverted elevation. Despite this unusual roof design, the team on the project showed a professional approach and carried out the project with no glitches.” www.sarnafil.co.uk


RCI JULY 2014
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