Housebuilders are being offered a quick and easy way to ensure compliance with new NHBC requirements on roof construction, through a “one stop” package from Glidevale. <br> <br> Following the prolonged cold winters, builders and home owners alike are reporting increased incidence of condensation formation in unventilated roofs, and are relying on vapour permeable membranes only to remove moisture vapour migrating to the roofspace. As a result, with immediate effect the NHBC has updated its standards to require high level ventilation – as already demanded under BS5250. NHBC is also stressing that its standard takes precedence over thirdparty assessments such as performance certification. <br> <br> Glidevale, supplier of roof ventilation solutions, has developed its Ultimate Cold Roof Solution to provide a simple means of meeting the new requirement. The solution encompasses Glidevale’s VP400 vapour permeable underlay combined with its Fulmetal Rediroll ventilated dry ridge and hip system. The combination delivers the 5,000mm per sq m of high level ventilation specified in both BS5250 and NHBC 2011 Standard clause 7.2-D11 and S11, with minimal additional material and labour costs, and without any need for additional installation processes or skills.<br> <br>