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.

Osb roof decking thickness 7 16 1 2 or 5 8 if were using osb we get 9 16 we dont worry about getting both 7 16 and 9 16 for walls then the roof we just get all of the same. 1 inch 25 4 mm. This way no worrying about grabbing scraps to fill in small spots and not having the correct thickness. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7.

Stamped shingle look metal roofing is more likely to dent because there s a small air space between the metal panel and the roof sheathing. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. The typical thickness range for sheathing is 3 8 to 3 4 inch.

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. Standing seam and flat shingle roofs are in direct contact with the roof sheathing. Sheathing should be a minimum of 19 32 inch thick. 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.

Never attach roof sheathing with staples. Because 22 24 or 26 gauge sheeting is thicker and will therefore remain more structurally sound over a longer span than a 29 gauge the building needs fewer supports which saves your customers money. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick.