Permo® air, a low resistance air-open underlay. It is the ideal solution where there is a high risk of condensation forming in the roofspace.
Product features & benefits
- Lowest vapour resistance of all breathable membranes
- Being both air open & vapour permeable further minimises the risk of condensation forming, particularly during the drying out period of a building
- No ventilation required
- Available in 2 widths: 1.5m x 50m & 1m x 50m
- Hydrophobically treated
- Type LR underlay
- Strong 3 layer material
- UV stable for 4 months
- Batten spacing 350mm
- Superior nail tear strength
Area of application
Suitable for cold and warm roof applications.
Permo® air is a strong 3 layer product consisting of UV stabilised PP fleece and a high performance Meltblown layer.
Roll size / Roll weight / Packaging
50m x 1.00m (50m2) / 8.6kg / 20 rolls/pallet
50m x 1,50m (75m2) / 13.0kg / 20 rolls/pallet
Permo® air should be laid in accordance with our installation details set out in the BBA certificate..