Vapor Barrier or Wind Barrier or Breathable Membrane
Specifications
They are waterproof and breathable and widely used in construction for roofing felt and underlay.vapor barrier or wind barrier or breathable membrane
1), Introduction of Waterproof Breathable Membrane
- Breathable Membrane is a water resistant membrane but with high vapour permeability, use as diffusion open roofing felts under pitched roof tile or vapour permeable barrier housewraps on timber frame walls
- Breather membrane functions as a water resistant barrier, preventing rain from getting into the roof or wall assembly while allowing water vapor to pass to the exterior.
- Breather membrane may also serve as an air barrier if it is sealed carefully at seams.
- Breathable Membrane have good "water resistance", good "water vapor permeability", and good "air barrier properties".
2), Technical data of Breathabe Membrane
- Products range: 80g,90g,100g,120g,140g,160g/m2.
- Roll size: 1.5m x 50m
- Water resistant : Class W1
- SD-value: 0.02m
- Vapor permeability: 3000g/m2/24h
- UV resistant: >3month
- Test to EN13859-1: Pass
3), Advantage of Breathable Membrane:
- CE mark available
- High quality with competitive price
- Excellent tensile and nail tear strength
- Good flexibility and ductility
- Light weight and thin, slip-resistant surface
- Simple handling and easy to use
- Anti-ageing: both heat and UV stable
4), Structure of Breathable Membrane:
All Kingway vapour permeable membranes are 3 layers thermal laminated:
PP non-woven fabric + PE fuctional film + PP non-woven fabric
Spun-bonded polypropylene non-woven fabric layers for protection and reinforcement.
Micro-porous polyethylene film is the functional layer which is water-resistant but allow water vapour to pass through.
6), Applications of Breathable Membrane :
1, Kingway Breathable roofing felts / roofing membrane use for the pitched roof tile underlay.
2, Kingway Breathable housewrap use for the wood frame walls house shell

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