Roofing Plywood Dimensions

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.

Roofing plywood dimensions.

Required dimensions of plywood for roofing. It will support roof. This kind of plywood can be used on roofs with minimal load. Rafters that are slightly farther apart might require inch or 5 8 inch thick plywood.

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. The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that. 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. Sheet with varying thickness. The minimum thickness of plywood used for roofing is 3 8 th of an inch. Steeper rather than flatter roofs will have lesser load per sq.

The standard width is 4 feet. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb. 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. It s the standard for spacing of 24 inches in the rafter although as mentioned a 5 8 inch thick is more ideal.

For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended. Foot and with a maximum of spacing of 16 inches between rafters. Tolerance for utility grade thickness is 1 32 inch and for cabinet grade plywood 1 64 inch. Many homes have rafters that are even wider at 24 inches apart and will require a thicker sheet of plywood.

The most common size for plywood sheets is 4 x 8 feet followed by 5 x 5 feet. When this is the case experts recommend a 5 8 inch thick sheet.