Breathable waterproof membrane and roofing underlay 500g

Product Description:

A roof underlay is a layer under the exterior roof that has a primary function of working as the shield that protects the thermal insulation material and the building structure from the effects of the weather. The roof underlay acts as a condensation barrier, which leads condensate water away from the underlay, and thereby also from the insulation material.

JianDa brand waterproof and vapor permeable membrane is polymer modified asphalt based, with surface of high strength polypropylene fiber.Back side coated with self adhesive glue or antiskid sand. Made by special process. With excellent waterproof  performance and breathable properties.   

USAGE:

It is used as the underlayment of cement tile, painted pottery watts ,asphalt shingle and wood structure roofing . Also suitable for all kinds of architectural roofing ,walls,underground waterproof and damp proof project.

Specifications:

1.Thickness: 0.8mm-2.0mm,or according to customer's requirements.

2.Upper surface: black/white/colored polypropylene,PE(separating) film, fine sand.

3. Back surface  : black polypropylene, finesand,PE (separating) film

4. We can offer customerized productions.