Metal Roof Directly On Sheathing

Work toward the ridge.

Metal roof directly on sheathing.

Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails. Begin on the left side of the roof working to the right. Metal tile and shingle roofing may also be applied to solid sheathing. I d not install plastic on the sheathing because it s a vapor barrier.

Metal roofing is also available in the form of shingles. Hi todd i have a pole barn design structure that had been turned into a livable dwelling with cathedral ceilings using rigid foam between the metal roof and the ceiling sheetrock i am redoing this and putting a decking down with tyvek protec 200 and then reattaching the metal roof and adding circular pest resistant soffit vents at the end rafters of the roof between purlins for ventilation. Overlap the edge of the roof by 1 inch. Most metal roof companies recommend installing felt paper on roof sheathing before you install the metal roofing.

For economic and structural lateral load reasons solid sheathing is almost always plywood osb or other structural panels. In this installation the vapor barrier is installed on the side of the insulation nearest the interior of the building. Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps. When using plywood nail it directly to the purlins and screw the metal roofing panels through the plywood into the purlins as instructed by the manufacturer.

The asphalt in the felt paper is waterproof and does a great job of protecting the untreated wood roof sheathing.