Plywood Roof Sheathing Thickness

The minimum plywood for roofing plywood is layers of wood.

Plywood roof sheathing 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. A flatter roof with rafters farther apart may need a thickness of up to inch. Several factors must be considered when determining appropriate roof sheathing thickness such as the. 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. Plywood is made with three or more layers of thin wood glued together with the grain. Many factors affect thickness. That s considered to be the minimum.

Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood. 1 inch 25 4 mm 1 pound per square foot 0 0479 kn m2. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. Allowable load psf for wood structural panel roof sheathing continuous over two or more spans and strength axis parallel to supports plywood structural panels are five ply five layer unless otherwise noted a b for si.

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. Required sheathing thickness for roofing important factors.