high quality econimocal ASTM roofing synthetic underlayment breathable membrane

Permeability of "KangDa" breathable membrane: "KangDa" breathable membrane paves outside of the insulation system, enable the water vapour inside the insulation system to exhaust, solve the condensation problem, protect the insulation system.

Breathable membrane allows your roof to breath, meaning you won't need traditional ventilation.

We are the first and largest producer of this product in China, we exported directly, so our price is very competitive and quality is always on the top.

I am Mr. Clock, contact me with skype: kangdaclock