Breathable housewrap foil is a water-resistant material which will allow water vapour to pass through when there is a difference in humidity on opposite sides of it.

Breathable membranes are used on the outside of frame walls under the exterior finish material. They have three functions to perform:

• to shed moisture and restrict any rain water which penetrates past the exterior finish from reaching the wood wall,
• to perform as a breather material allowing any moisture within the wall cavity to escape by diffusion through the membrane to the exterior, and
• to act as a wind barrier to restrict movement of air through the wall.

To qualify for the above functions the breather membrane must have good "water resistance", good "water vapour permeability", and good "air barrier properties".

Breathabe Membrane Specification

• 1, Standard : EN13859-1 (CE mark optional)
• 2, Weight: 80g, 90g, 100g, 115g, 120g, 135g, 140g, 160g, 180g/m2.
• 3, water resistance: calss W1 (water column ≥1500mm)
• 4, breathability: ≥2250g/m2/24h (SD-value 0.02m)
• 5, UV resistance: ≥3 months
• 6, Roll width: 1.5m
• 7, Roll length: 50m
• 8, Packing: each roll with PE bag or PVC shrink wrap film.
• 9, Loading: with pallets packing or bulk loading.

Key Features of Breathable Membrane:

• CE certificated, high quality with competitive price
• Waterproof & vapor permeable
• High breathability
• 3-layer laminate (PP+PE+PP)
• Anti-UV stable; anti-aging stable
• Excellent tensile and nail tear strength
• Good flexibility and ductility
• Light weight and thin, slip-resistant surface
• Simple handling and easy to use
• Energy saving
• Long term durability
• Use as roofing underlayment or housewrap