Air and moisture permeable membranes are high performance BBA certified underlay that can be used on both warm and cold roof structures. They are durable, flexible and lightweight, making them easy to install with exceptional nail and tear strength.
Air & Vapour Permeable Membranes
Powerlon Vapour Control Layer UltraBlock 200 reflective - 1.6m x 50m
103 gsm; 630 MNs/g Water Vapour Resistance
Powerlon Vapour Control Layer UltraBlock 300 - 1.6m x 50m
270 gsm; 25,000 MNs/g Water Vapour Resistance