Plywood Thickness For Roofing

Many homes have rafters that are even wider at 24 inches apart and will require a thicker sheet of plywood.

Plywood thickness for roofing.

Plywood is made with three or more layers of thin wood glued together with the grain. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb. When this is the case experts recommend a 5 8 inch thick sheet. That s considered to be the minimum.

Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. The ideal thickness for the standard rafter spacing of 24 inches is 5 8 th of an inch. We also carry pre cut project panels that are available in different sizes that may vary by store. 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.

That s considered to be the minimum. The minimum thickness of plywood used for roofing is 3 8 th of an inch. With edge support and the same snow load 3 8 inch osb can be used. Foot and with a maximum of spacing of 16 inches between rafters.

Osb and plywood come in thicknesses ranging from 5 16 to 3 4 inch and the thickness needed for a particular roof depends on several factors including rafter spacing expected load and roof. The thickness of plywood used for roof decking depends on the roof slope the spacing of. 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.

Many factors affect thickness. Steeper rather than flatter roofs will have lesser load per sq. The most common size for plywood sheets is 4 x 8 feet followed by 5 x 5 feet. The minimum plywood for roofing plywood is layers of wood.