Plywood Sheathing Thickness Roof

Keep in mind that the load of the roof still plays a role in the plywood thickness.

Plywood sheathing thickness roof.

That s considered to be the minimum. Fortunately this is one issue that has primarily been standardized. 1 inch 25 4 mm. A is smooth and knot free while d the lowest quality has missing knots and cracks.

Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively. Another issue that many people encounter is what size plywood the roof may need. Once you have the area you can divide by the area of a sheet of plywood to find the number of sheets needed. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick.

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. 8d ring shank nails should be used instead. The typical thickness range for sheathing is 3 8 to 3 4 inch. If your roof has triangles and other shapes you ll need to use a calculator to find the square footage.

If your roof is more on the flatter side then it s. So dividing the area of the roof by 32 will give you the number of. 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. The common grade of plywood for roof sheathing is cdx.

It should be placed up on the roof. One side is usually better quality than the other c in this case. It adds proven performance and durability to new homes room additions and renovations. Plywood sheathing delivers outstanding rigidity strength and versatility and is an excellent choice for.

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. What size plywood for the roof. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7.

As a quick primer in plywood each side is rated from a to d. A flatter roof with rafters farther apart may need a thickness of up to inch. A 4 8 sheet of plywood is 32 ft 2.