Plywood Sheathing Thickness Roof

That s considered to be the minimum.

Plywood sheathing thickness roof.

Sheathing should be a minimum of 19 32 inch thick. It should be placed up on the roof. Keep in mind that the load of the roof still plays a role in the plywood thickness. The common grade of plywood for roof sheathing is cdx.

8d ring shank nails should be used instead. Fortunately this is one issue that has primarily been standardized. So dividing the area of the roof by 32 will give you the number of. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7.

A is smooth and knot free while d the lowest quality has missing knots and cracks. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. 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.

If your roof has triangles and other shapes you ll need to use a calculator to find the square footage. Osb and plywood come in thicknesses ranging from 5 16 to 3 4 inch and the thickness needed for a particular roof depends on several factors including rafter spacing expected load and roof design. One side is usually better quality than the other c in this case. What size plywood for the roof.

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. Another issue that many people encounter is what size plywood the roof may need. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. As a quick primer in plywood each side is rated from a to d.

1 inch 25 4 mm. If your roof is more on the flatter side then it s. Plywood sheathing is ideal for residential and light plywood sheathing is ideal for residential and light construction and every piece meets the highest grading standards for strength and appearance. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively.

A flatter roof with rafters farther apart may need a thickness of up to inch. Never attach roof sheathing with staples. A 4 8 sheet of plywood is 32 ft 2.