Shed Roof Underlay

Underneath the shingles is osb sheathing.

Shed roof underlay.

It is used for temporary roofing for weatherproofing and as an underlayment under shingles or other permanent roofing materials. However moisture has a way of finding its way into a structure. Roofing felt is essential to ensure your outbuilding is ready for all weathers by providing a waterproof cover to the building s roof. Otherwise known as the cap sheet.

This is a type of engineered particleboard made specifically for covering the roof of a shed or dwelling. Roof felt also known as tar paper is a waterproof fiberglass product. Nailing a layer of underlay allows the boards to move about underneath it and the top felt layer s are unaffected. Watch and see how easy it is.

If your shed roof is flat or has a pitch of 18 degrees or less consider building a green roof on it. Obviously this underlay layer with nail holes all over it won t be waterproof so you need at least one layer over it for protection. Roofing shingles and materials plus factory certified roofers including ratings from real homeowners from north america s largest roofing manufacturer. Begin at the bottom of one side of the roof and lay the underlay horizontally all the way across the roof.

If the roof abuts to a wall trim the roofing underlay to allow roughly 50mm to go onto the wall. At a hip take the underlay from the first side around the corner then overlap from the second side by approximately 150mm. Standard asphalt shingles do an excellent job keeping the weather out. Best shed felt roof ever for those who have never seen a professional grade roofing feltbefore let me introduce you to mineral faced torch on roofing felt.

Shingling a shed and want some tips. At a verge lay the roofing underlay approximately halfway over the outer wall skin or the outer rafter on an overhanging verge. Often what is referred to as cap nails or red head or green head nails are used to attach the felt to the plywood because these nails have a large nail head with a small tack in the middle making it less likely to rip or tear the felt. Ideal for an apex flat or pent roof shed felt and roofing membrane are durable and perfect for a newly built structure or to re cover existing roofing material.

Whatever your reason for attaching. Handy home shows you universal shingling techniques that can be applied to any shed.