Permavent breather membranes are manufactured using the latest technology. They are fully CE certified and are rigorously tested to comply with European Harmonised Standards. Their membranes are also fully tested by BRE and are certified by LABC. We stock their high-performance breathable membrane which is fully CE certified and manufactured from the highest-grade hydrophobic film. Suitable for use on all types of roofing applications and ideal for use under lightweight roof tiles.