Cromar Vent 3 Blue Breathable Roofing Membrane 1.5m x 50m is a vapour-permeable roofing underlay designed for use in pitched roof construction. Installed beneath the primary roof covering, the membrane provides a secondary protective layer while allowing water vapour to pass through the roof construction. The wider 1.5 metre roll provides 75m² of membrane before allowing for laps and wastage, making it suitable for new roofing projects, extensions, renovations and roof repairs.
