Installing Metal Roofing Over Osb

Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails.

Installing metal roofing over osb.

Repair any rotted sections of plywood before installing the metal panels. Most metal shingles will be attached to the roof using metal shingle. Tamko requires the fastening of every tile in addition to mortar or adhesive or foam. Remove the old roofing.

April 3 2017 filed under. Metal roofing roofing answers roofing installation roofing materials oriented strand board commonly referred to as osb is a type of engineered lumber similar to particle board formed by adding adhesives and then compressing layers of wood strands. Inspect the plywood for damaged areas. Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps.

Work at a comfortable steady pace trying not to rip up or carry off too much old roofing at once. Sweep the plywood clean of all dirt and. For many applications a layer of plywood underneath your metal roofing is an unnecessary expense. Remove all unused vents pipes and protrusions.

In order to avoid a hump at the transition from two layers of materials to one the notation on the building plans advises to lower the roof purlins in these areas by 7 16. How to apply metal roofing over plywood. Although you can install corrugated metal roofing over shingles for the best foundation it is recommended that all the old roofing be removed. Osb exterior gypsum before installing tw metal and tile underlayment under copper roofing fasteners and batten strips must be used when installing tiles over tw metal and tile.

Watch this now to learn how to avoid this same pr. Then the top of all your purlins once osb under metal roof panels is placed will be in the same plane and the roof steel will lay flat.