Plywood Thickness For Roofing

With edge support and the same snow load 3 8 inch osb can be used.

Plywood thickness for roofing.

The ideal thickness for the standard rafter spacing of 24 inches is 5 8 th of an inch. Keep in mind that the load of the roof still plays a role in the plywood thickness. Steeper rather than flatter roofs will have lesser load per sq. 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. That s considered to be the minimum. The minimum plywood for roofing plywood is layers of wood. The thickness of plywood used for roof decking depends on the roof slope the spacing of.

Plywood is made with three or more layers of thin wood glued together with the grain. Foot and with a maximum of spacing of 16 inches between rafters. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb. 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.

When this is the case experts recommend a 5 8 inch thick sheet. We also carry pre cut project panels that are available in different sizes that may vary by store. This kind of plywood can be used on roofs with minimal load. That s considered to be the minimum.

Many factors affect thickness. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. The most common size for plywood sheets is 4 x 8 feet followed by 5 x 5 feet. The minimum thickness of plywood used for roofing is 3 8 th of an inch.