Skip to main content
Vapour barrier _db.jpg

A vapour barrier is the layer in a building component which reduces the diffusion of water vapour in the construction. The layer is defined by the vapour diffusion equivalent air layer thickness sd, which defines the thickness of an air layer providing the same resistance to vapour diffusion as a layer of a material with the thickness d, and the vapour diffusion resistance µ as given by sd = µ x d [m].

A layer in a building component with a vapour diffusion equivalent air layer thickness sd ≥ 1500 m is by definition a vapour seal. Membranes possessing a diffusion equivalent air layer thickness which depend on the relative humidity are called moisture adaptive vapour barriers.

Manufacturer

According to EN 13984 (sd ≤ 10 m)

According to EN 13984 (sd ≥ 10 m)

Vapour seals (sd ≥ 1500 m)

Product Manufacturer Additional info
Wütop Dampfsperre DS Alu Würth HandelsgesmbH DoP (853 KB) , Further information (205 KB)

letzte Änderung