Roofing Plywood Dimensions

It s the standard for spacing of 24 inches in the rafter although as mentioned a 5 8 inch thick is more ideal.

Roofing plywood dimensions.

Sheet with varying thickness. The standard width is 4 feet. We also carry pre cut project panels that are available in different sizes that may vary by store. Tolerance for utility grade thickness is 1 32 inch and for cabinet grade plywood 1 64 inch.

These project panels help eliminate waste cut costs and are easier to transport than full size panels. 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. Rafters that are slightly farther apart might require inch or 5 8 inch thick plywood. Plywood typically comes in 4 8 ft.

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. 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.

Many homes have rafters that are even wider at 24 inches apart and will require a thicker sheet of plywood. It will support roof. 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 thickness of plywood used for roofing is 3 8 th of an inch.

The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that. You might be tempted to choose a inch thickness although it s unnecessary in most cases. Required dimensions of plywood for roofing. 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. 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.