- Air and vapour permeable membrane
- 180 g/m2
- Integrated tape (25% less membrane usage)
- Use without ventilation
- Conforms to BS5534:2014+A2:2018
- Fully BBA certified
- 3 layers membrane
- For use on any types of roofing/walling applications
- UV stable for 3 months
- An untaped version is also available
- Available in 1m x 50 rolls taped; 0.5m x 50m, 1m x 50m and 1.5m x 50m rolls untaped
Fully Air Permeable
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.
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.
Permavent APEX is highly water resistant with a W1 rating (EN 13589).
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 and our taped version can be used in all UK wind zones without the need for high and low level ventilation.
Integrated Double Tape System
Permavent APEX is available with a unique integrated double tape system. This ensures that the laps of the membrane are restrained in any weather condition using a 100mm head lap and meet the BS5534:2014+A2:2018 Code of Practice standard. This can reduce membrane usage by up 25%.