- BBA, IAB, LABC and CE approved for cold and warm roofs
- NHBC approved for no additional high ventilation
- No additional ventilation required
- Hydrophobically treated
- Type LR underlay
- Strong 3 layer material
- Recyclable
- UV stable for 4 months
- Batten spacing 350mm
- SD Value 0.009m
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. Being both air open & vapour permeable further minimises the risk of condensation forming, particularly during the drying out period of a building. Available in 1m x 50m rolls.
