Building materials
Wood/Wood composites
  Beams, columns, lintels
Particle composites
Fibre composites
Laminates
Planed wood
Other
  Insulation
Lining materials
Foils/Barriers/ membranes
Façade solutions
Further information
  Explanation of Data sheets - support information
       



print version
    foil/barrier membrane - Vapour barrier

The layer in a building component which reduces the diffusion of water vapour in the construction. A vapour barrier 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 . d [m]. A layer in a building component with a vapour diffusion equivalent air layer thickness sd ≥ 1500m is by definition a vapour barrier. Membranes possessing a diffusion equivalent air layer thickness which depend on the relative humidity are called moisture adaptive vapour barriers.
   
       
     
 
 
Product Manufacturer Product information
AIRSTOP DIVA Isocell GmbH tech. Information (pdf, 372KB)
Vario KM Saint-Gobain Isover Austria AG Vario KM (pdf, 52KB)
 
 
Product Manufacturer Product information
ÖKO-NATUR Isocell GmbH tech. Information (pdf, 382KB)
Wütop Dampfbremse DB2 Würth HandelsgesmbH Info Wütop DB2 (pdf, 221KB)
 
 
Product Manufacturer Product information
Wütop Dampfbremse DB20 Würth HandelsgesmbH techn. Information (pdf, 183KB)
 
Manufacturer of vapour barriers with sd≥ 1500m
 
Product Manufacturer Product information
Wütop Dampfsperre DS Alu Würth HandelsgesmbH Info Wütop DS Alu (pdf, 379KB)