Highly breathable 3-ply roof underlay polypropylene sheet. Resistent to UV rays and to heat. Made by a special functional membrane sandwiched between two layers of polyester spunbond nonwoven and 1 inner “functional” membrane made of polyethylene. Roll of 1,50 x 50m. Single packed in cellophane tape.
Polypropylene and polyethylene
Used to protect infiltration of water, air and wind. It guarantes correct breathability, optimizing the effectiveness of the insulation.