Roof Sheathing Thickness For Metal Roof

Post frames generally lack structural sheathing so the roof and wall panels must span between the supporting trusses or purlins.

Roof sheathing thickness for metal roof.

8d ring shank nails should be used instead. This way no worrying about grabbing scraps to fill in small spots and not having the correct thickness. The typical thickness range for sheathing is 3 8 to 3 4 inch. Standing seam and flat shingle roofs are in direct contact with the roof sheathing.

Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. The thickness of plywood used for roof decking depends on the roof slope the spacing of rafters and the weight of other material to be put over the decking as well as the design load the. Sheathing should be a minimum of 19 32 inch thick. 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.

Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. That s considered to be the minimum. Never attach roof sheathing with staples. This minimum will only work if the rafters are set 16 inches apart at most and if the roof doesn t have too much load.

1 inch 25 4 mm. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively.