Plywood Thickness For Roofing

Many factors affect thickness.

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. The most common thickness of plywood is 1 2 inch but plywood thickness can range from 1 8 inch. The ideal thickness for the standard rafter spacing of 24 inches is 5 8 th of an inch. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb.

That s considered to be the minimum. When this is the case experts recommend a 5 8 inch thick sheet. Steeper rather than flatter roofs will have lesser load per sq. We also carry pre cut project panels that are available in different sizes that may vary by store.

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. Many homes have rafters that are even wider at 24 inches apart and will require a thicker sheet of plywood. This kind of plywood can be used on roofs with minimal load. 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. Foot and with a maximum of spacing of 16 inches between rafters. Keep in mind that the load of the roof still plays a role in the plywood thickness.

Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. The minimum thickness of plywood used for roofing is 3 8 th of an inch. A flatter roof with rafters farther apart may need a thickness of up to inch. The minimum plywood for roofing plywood is layers of wood.