Metal Roofing Over Skip Sheathing

I pulled up my roofing quote for materials.

Metal roofing over skip sheathing.

My shingles cost about 3113 and osb is 1080. In most cases 1 6 sheathing at 24 in. Prior to the installation of an additional layer of roofing material over an existing layer s. After you strip the roof do spot repairs to the existing sheathing where needed then go right over it.

Where code allows re roofing over 2 layers of asphalt shingles follow the local code. Underlying sheathing is being replaced or added over skip sheathing a nailing inspection is minimum 3 in 12 for lapped nonsoldered non sealed metal roof panels. Preformed metal roofing is lightweight and runs continuously in the direction of the rafters. The roofing material is heavy so 1 6 or 1 8 or 2 4 open sheathing is practical.

Concrete tiles depending on the type may be installed on open sheathing spaced in the 12 in. You ll want to use both longer sheathing nails and longer roofing nails. Sheathing with gaps between. The entire roof deck is relatively uniform where you can step on any part of it without slipping through spaces.

Fasteners metal shavings care should be taken to avoid stepping in the retrieve here. Overlap the next panel straight above the first by 12 inches and secure it the same way you secured the first. Make sure there s a 1 inch overlap the edge of the roof by one inch then secure it by drilling 1 and 1 2 inch galvanized metal screws through the panel in 12 inch to 16 inch intervals. Felt and ice and water is 415 so that totals 4608.

Osb or plywood over skip sheathing makes for a much stiffer roof deck resists problems with expansion better and obviously doesn t require all the hassle of removing it. When you think of a modern plywood roof deck you re not imagining gaps between the sheets of plywood. Metal roofing is about 135 sq so that makes it around 4700 plus a few hundred for the purlins.