waterproof and vapour permeable membrane used as roofing underlayment good tensile light weight similar to Tyvek's material

Vapour permeable roof membrane

Width: 100cm,  150cm

Length: 25m-50m-100m

Grammage (g/m2):  80-400

Water-vapor Permeability

  g/m2: 

 Series I>3000,  Series II: around 2500  Series III: around 1000

Hydrostatic head (pa): >3000

Tensile Strength (N): 105-350(CD)  65-250(MD)

Elongation (N): 68-150(CD)   72-150(MD)

Vapour permeable roofing membrane