waterproof breathable membrane protect the building durability100g/m2

     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 3 Layer Roofing Underlay   

        "Breathable membrane allows your roof to breath, meaning you won't need traditional ventilation. It's suitable for use as a full supported or unsupported underlay beneath your slate or tiles, on warm or cold non-ventilated and cold ventilated roofs. A good breather membrane can improve energy efficiency - saving money on bills - and provide durable protection against condensation, water and air infiltration. Due to their adaptability and mulitipurpose use, beathable membranes are growing in popularity.

KangDa vapour barrier roof membrane

         Because the roof membrane has not only the function of breathable, but also the function good waterproof. As the polypropylene spunbond fabric is water repellent itself, the water drop will not be absorbent by the membrane, but will keep it as round water drop and fall off the roof. So the spunbond roofing membrane is the best choice for this roofing membrane, and it is very cheap compare to other material.?

KangDa Breawarf Diffiusion Foils (C120)  

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