Installing Metal Roofing Over Osb

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.

Installing metal roofing over osb.

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. April 3 2017 filed under. 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.

Work at a comfortable steady pace trying not to rip up or carry off too much old roofing at once. 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. Sweep the plywood clean of all dirt and. 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.

Remove the old roofing. Remove all unused vents pipes and protrusions. Watch this now to learn how to avoid this same pr. Although you can install corrugated metal roofing over shingles for the best foundation it is recommended that all the old roofing be removed.

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. Hammer down all raised nails. Tamko requires the fastening of every tile in addition to mortar or adhesive or foam. How to apply metal roofing over plywood.

Inspect the plywood for damaged areas. I m halfway though sheeting the roof of my shipping container shop and already need to redo some of it.