breathable waterproof membrane synthetic roofunderlayment roof felt

     How the "water-drop" come out? In different temperature, the air will contain different amount of moisture in itself, the warmer the more moisture. In winter, the air close to inside of wall or roof will be warmer, and when it pass through insulation layer and touches the cold roof tiles or shingle, it will fast condensation and become "water-drop". These water drops will fall back to insulation material, because of this, the insulation material will become wet. As it is inside of roof or wall, it will not easy to dry. And then, the insulation layer material will be damp and mould, been damaged quickly.

KangDa Waterproofing Roof Foils   

        While being highly resistant to wind and water penetration from the outside Kangda breathable membrane is highly “diffusion open” on the inside giving it the ability to freely transport moisture from within the inner wall or roof cavity to the outside. This effectively prevents the mould and subsequent structural damage that can result when moisture becomes trapped during construction, and over time, from driving rain and internally driven dampness caused by condensation when humidity levels are high. Adding to the risk of structural decay is the wall and roof insulation which also becomes damp as a result of trapped moisture.

KangDa vapour barrier roof membrane

         We are Breathable membrane producer and exporter, the breathable membrane is used for pitched roof underlay (under tiles), and house wrap. This high perm membrane is a three layer structure; it is made of polypropylene, high permeability. Our company can produce now max 3m width rolls, Largest producer in China.

KangDa Breawarf Diffiusion Foils (C120)  

 I am Mr. Clock, contact me at sales(at)ntkdfh.com

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