View the Klober BPi entry Visit the Klober website The variable performance of vapour permeable underlays ultimately led to the decision by the NHBC and the BSI that only air-open membranes could be used without supporting high level ventilation. Klober Permo® air offers an exceptional level of breathability, with a water vapour transmission sd-Value of 2736 g/m2/day and a water …
Klober Permo® roofing underlays for the most complex roofing designs
View the Klober entry on BPi Visit the Klober website When it comes to choice of roofing membranes, Klober Permo® underlays and vapour control layers offer the widest range of application and performance. From the ‘air-open’ Permo air to the low pitch Permo extreme RS SK2 and Wallint® solar air barrier all enjoy specifications on projects of considerable diversity and …