APEX air permeability allows moisture to escape through the movement of air, which eliminates interstitial condensation in pitched roofs. This can be particularly important during the drying out period of a new build.
Vapour Permeable
Permavent APEX vapour permeability helps to reduce the condensation withing the roof structure, whilst protecting it from the rain and wind outside until primary barriers are installed. Permavent APEX has Sd value of 0.01m.
Water Resistance
Permavent APEX is highly water resistant with a W1 rating (EN 13589).
BBA Certification
Permavent APEX has full BBA Certification for use in both cold and warm non ventilated roofs.
Compliant with BS 5534: 2014 + A2 2018 Code of Practice
Permavent APEX is fully compliant with BS5534:2014+A2:2018 Code of Practice.
Can be used with our Roof Batten is BS 5534:2014 compliant.
