Roofing Plywood Dimensions

Steeper rather than flatter roofs will have lesser load per sq.

Roofing plywood dimensions.

Many homes have rafters that are even wider at 24 inches apart and will require a thicker sheet of plywood. Its size tolerances especially for thickness are smaller that those for the utility grade plywood used in the building trades for roof and wall sheathing subfloors and general use purposes. Tolerance for utility grade thickness is 1 32 inch and for cabinet grade plywood 1 64 inch. You might be tempted to choose a inch thickness although it s unnecessary in most cases.

Required dimensions of plywood for roofing. This kind of plywood can be used on roofs with minimal load. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb. Plywood typically comes in 4 8 ft.

The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that. Keep in mind that the load of the roof still plays a role in the plywood thickness. The minimum thickness of plywood used for roofing is 3 8 th of an inch. It will support roof.

You can get plywood sheets with a length of up to 10 feet. 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. 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. We also carry pre cut project panels that are available in different sizes that may vary by store.

Foot and with a maximum of spacing of 16 inches between rafters. Rafters that are slightly farther apart might require inch or 5 8 inch thick plywood. When this is the case experts recommend a 5 8 inch thick sheet. For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended.

The standard width is 4 feet. The most common size for plywood sheets is 4 x 8 feet followed by 5 x 5 feet.