Plywood Thickness For Roofing

That s considered to be the minimum.

Plywood thickness for roofing.

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. 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 minimum plywood for roofing plywood is layers of wood. The most common thickness of plywood is 1 2 inch but plywood thickness can range from 1 8 inch.

We also carry pre cut project panels that are available in different sizes that may vary by store. A flatter roof with rafters farther apart may need a thickness of up to inch. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb. The minimum thickness of plywood used for roofing is 3 8 th of an inch.

Plywood is made with three or more layers of thin wood glued together with the grain. With edge support and the same snow load 3 8 inch osb can be used. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. Many factors affect thickness.

When this is the case experts recommend a 5 8 inch thick sheet. The thickness of plywood used for roof decking depends on the roof slope the spacing of. Keep in mind that the load of the roof still plays a role in the plywood thickness. Many homes have rafters that are even wider at 24 inches apart and will require a thicker sheet of plywood.

The ideal thickness for the standard rafter spacing of 24 inches is 5 8 th of an inch. Foot and with a maximum of spacing of 16 inches between rafters. This kind of plywood can be used on roofs with minimal load. That s considered to be the minimum.