Bayonet Pauloid Synthetic SS Roof Underlay is your essential second line of defence against moisture and drafts.
Bayonet’s Pauloid Synthetic Roof Underlay consists of a micro-porous water-resistant film, laminated to two layers of non-woven spun-bonded polyolefin. It’s black on the top face, white on the bottom face and is printed with handy laying lines.
Fully self-supporting down to 10 degrees, there’s no need for netting – just attach it directly to your timber or steel framing. Can be used under any roof cladding and also provides temporary protection against the weather before you get your wall cladding or roofing material up.