Plywood Thickness For Roofing

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

Plywood thickness for roofing.

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. We also carry pre cut project panels that are available in different sizes that may vary by store. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. Many factors affect thickness.

That s considered to be the minimum. The ideal thickness for the standard rafter spacing of 24 inches is 5 8 th of an inch. The minimum plywood for roofing plywood is layers of wood. With edge support and the same snow load 3 8 inch osb can be used.

The most common size for plywood sheets is 4 x 8 feet followed by 5 x 5 feet. The thickness of plywood used for roof decking depends on the roof slope the spacing of. That s considered to be the minimum. When this is the case experts recommend a 5 8 inch thick sheet.

Plywood is made with three or more layers of thin wood glued together with the grain. Many homes have rafters that are even wider at 24 inches apart and will require a thicker sheet of plywood. Steeper rather than flatter roofs will have lesser load per sq. This kind of plywood can be used on roofs with minimal load.

Sheets of 7 16 inch thick with no edge support can be used in an area where the snow load is 30 pounds per square foot. Foot and with a maximum of spacing of 16 inches between rafters. The most common thickness of plywood is 1 2 inch but plywood thickness can range from 1 8 inch. Keep in mind that the load of the roof still plays a role in the plywood thickness.