Roofing Plywood Dimensions

For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended.

Roofing plywood dimensions.

Sheet with varying thickness. Rafters that are slightly farther apart might require inch or 5 8 inch thick plywood. 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. Keep in mind that the load of the roof still plays a role in the plywood thickness.

Plywood typically comes in 4 8 ft. Many homes have rafters that are even wider at 24 inches apart and will require a thicker sheet of plywood. The minimum thickness of plywood used for roofing is 3 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.

The standard width is 4 feet. The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that. Required dimensions of plywood for roofing. It s the standard for spacing of 24 inches in the rafter although as mentioned a 5 8 inch thick is more ideal.

When this is the case experts recommend a 5 8 inch thick sheet. 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. You might be tempted to choose a inch thickness although it s unnecessary in most cases.

These project panels help eliminate waste cut costs and are easier to transport than full size panels. Steeper rather than flatter roofs will have lesser load per sq. This kind of plywood can be used on roofs with minimal load. 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.

Foot and with a maximum of spacing of 16 inches between rafters. We also carry pre cut project panels that are available in different sizes that may vary by store.