Permo® light is a strong 3-layer vapour permeable roofing underlay suitable for warm and cold pitched roofs. Permo® light should be laid in accordance with our installation details and BBA/IAB Certificates.
Suitable for warm and cold pitched roofs.
3 layer material, BBA, IAB & CE approved for cold & warm roofs, UV stable for 4 months, Hydrophobically treated, Allows the roof structure to breathe, yet fully waterproof, Counterbattens only required on fully supported applications, Limits air leakage in a sealed roof application, Type LR underlay
Strong laminated sheet material, with outer layers of polypropylene, and an inner layer of microporus polyethylene film