Discover a new underlay that is stronger, lighter and safer than conventional felt roofing paper.
HyrdraShell25 is a synthetic underlay constructed of high strength woven fabric that is polypropylene coated on both sides.
A specially formulated anti-slip walking surface is 100% asphalt free, offering a safer alternative to conventional roof underlay.
HyrdraShell25 is 2.5 times lighter per square and 25 times stronger than #15 asphalt felt paper, and comes 10 squares to a roll, offering more coverage per roll. HyrdraShell25 is UV-resistant and can be exposed for up to six months. Its pre-printed nailing pattern provides ease of installation.