Installing Metal Roofing Over Osb

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.

Installing metal roofing over osb.

April 3 2017 filed under. How to apply metal roofing over plywood. Repair any rotted sections of plywood before installing the metal panels. 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.

Remove all unused vents pipes and protrusions. Most metal shingles will be attached to the roof using metal shingle. For many applications a layer of plywood underneath your metal roofing is an unnecessary expense. 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.

Metal roofing panels rated for architectural use attached to purlins horizontal pieces of wood or metal fastened to roofing trusses are structurally sound when installed according to your roofing manufacturer s instructions and local building codes. Remove the old roofing. Although you can install corrugated metal roofing over shingles for the best foundation it is recommended that all the old roofing be removed. Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails.

I m halfway though sheeting the roof of my shipping container shop and already need to redo some of it. Sweep the plywood clean of all dirt and. Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps. Watch this now to learn how to avoid this same pr.

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. Work at a comfortable steady pace trying not to rip up or carry off too much old roofing at once.