Visqueen High Performance (HP) Vapour Barrier is used to omit the risk of interstitial condensation within a structure as well as improving the general airtightness of the building. Visqueen HP Vapour Barrier restricts the passage of warm, moist air from within the building from permeating into the structure or the roof. It is commonly used within timber frame housing as well as commercial buildings. Visqueen HP Vapour Barrier is a high quality multi layer reinforced LDPE membrane with an aluminium core.