Plywood Roof Sheathing Thickness

A flatter roof with rafters farther apart may need a thickness of up to inch.

Plywood roof sheathing thickness.

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. Always ensure your work site is compliant with current osha regulations. Plywood subflooring 3 8 plywood plywood roof sheathing 3 4 plywood 4x8 3 4 sheathing plywood 48 24 sheathing plywood.

Keep in mind that the load of the roof still plays a role in the plywood thickness. The minimum plywood for roofing plywood is layers of wood. Plywood is made with three or more layers of thin wood glued together with the grain. Avoid roof complaints with proper framing sheathing and roofing techniques.

1 inch 25 4 mm. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively. Several factors must be considered when determining appropriate roof sheathing thickness such as the. Produced by apa the engineered wood association formerly the american plywood association in 1989.

The thickness of plywood used for roof decking depends on the roof slope the spacing of. 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. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. That s considered to be the minimum.

Minimum plywood thickness the international residential code specifies 3 8 inch plywood for sheathing walls with a standard stud spacing of 16 inches if the siding is nailed to the studs through. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood. When this is the case experts recommend a 5 8 inch thick sheet. Many factors affect thickness.