Plywood Roof Sheathing Thickness

Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood.

Plywood roof sheathing thickness.

Several factors must be considered when determining appropriate roof sheathing thickness such as the. Plywood is made with three or more layers of thin wood glued together with the grain. Many factors affect thickness. Plywood subflooring 3 8 plywood plywood roof sheathing 3 4 plywood 4x8 3 4 sheathing plywood 48 24 sheathing plywood.

Avoid roof complaints with proper framing sheathing and roofing techniques. When this is the case experts recommend a 5 8 inch thick sheet. Keep in mind that the load of the roof still plays a role in the plywood thickness. 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. Always ensure your work site is compliant with current osha regulations. That s considered to be the minimum. A flatter roof with rafters farther apart may need a thickness of up to inch.

Many homes have rafters that are even wider at 24 inches apart and will require a thicker sheet of plywood. 1 inch 25 4 mm. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. This video may depict some work practices that do not meet current safety standards.

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. Required sheathing thickness for roofing important factors. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7.