50Mtrs x 1.5Mtr Roll Breathable Roofing Felt - Permavent Eco50Mtrs x 1.5Mtr Roll Breathable Roofing Felt - Permavent Eco
Vent 3 Light is manufactured by thermally bonding two spunbonded polypropylene fabric layers, with a microporous film, between the teo layers to form a breathable waterproof membrane.
Vent 3 Light allows any moist air within the construction to pass out of the building while offering some weather protection from rain and snow

Full fitting instructions included.