Permavent BLACK is a vapour-permeable roofing underlay suitable for use in both roof and wall applications. It is designed to form an airtight layer within the building envelope.
The underlay allows the controlled passage of water vapour while providing resistance to external moisture. With a W1 water resistance classification, Permavent BLACK is suitable for pitched roofing and walling applications.
Permavent BLACK is available with an integrated tape system, enabling sealed overlaps to support airtightness, improve installation efficiency, and reduce material waste on site.
