Plywood Roof Sheathing Thickness

The thickness of plywood used for roof decking depends on the roof slope the spacing of.

Plywood roof sheathing thickness.

Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood. Plywood is made with three or more layers of thin wood glued together with the grain. Produced by apa the engineered wood association formerly the american plywood association in 1989. Avoid roof complaints with proper framing sheathing and roofing techniques.

A flatter roof with rafters farther apart may need a thickness of up to inch. The minimum plywood for roofing plywood is layers of wood. That s considered to be the minimum. Always ensure your work site is compliant with current osha regulations.

Many homes have rafters that are even wider at 24 inches apart and will require a thicker sheet of plywood. When this is the case experts recommend a 5 8 inch thick sheet. Required sheathing thickness for roofing important factors. Keep in mind that the load of the roof still plays a role in the plywood thickness.

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. That s considered to be the minimum. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7.

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. Many factors affect thickness. Several factors must be considered when determining appropriate roof sheathing thickness such as the. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively.