Installing Metal Roof Over Osb

Then cover the entire roof with a layer of insulation and secure it with a staple gun.

Installing metal roof over osb.

For many applications a layer of plywood underneath your metal roofing is an unnecessary expense. If there are gutters installed on the eaves the eave flashing should be installed to overhang the lip of the gutter by about 1 2 inch. Rib metal panel fetch full source. Work toward the ridge.

April 3 2017 filed under. Installation manual for dc rib metal option 2 install metal over solid decking trusses with 5 8 osb or plywood decking use synthetic felt 30lb felt paper 1 4 styrofoam roofing nail pattern for d c. Overlap the edge of the roof by 1 inch. Before you install metal roofing repair any damage to the wood under the shingles.

Install the first metal panel on the low end of the roof square to the eave. Use 1 1 4 inch nails to cover the outline of the roof with strips of metal eave flashing also called edging. Place corner pieces where panels will meet bends at the edge of the roofing. Next use 1 inch nails to secure some metal edging to the perimeter of the roof.

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. Secure the metal panel to the deck by drilling 1 1 2 inch galvanized metal screws through the peak of the rib in 12 inch to 16 inch intervals.