Vapour Permeable Underlays
Permo Forte is a strong laminated sheet material, with outer layers of polypropylene, an inner layer of microporus polyethylene film and re-inforcement mesh.
Colour
Outer surface- Light grey Inner surface- White
Permo® air is the most breathable air open low resistance underlay on the market. It is the ideal solution where there is a high risk of condensation forming in the roofspace.
