Roof Thickness Plywood

Sheet with varying thickness.

Roof thickness plywood.

However you may need to consider bolstering the plywood thickness for a roof that has a higher load. It s the standard for spacing of 24 inches in the rafter although as mentioned a 5 8 inch thick is more ideal. In this case plywood should be a minimum of 3 8 inch thick. The most common thickness of plywood is 1 2 inch but plywood thickness can range from 1 8 inch.

Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb. Plywood is often sold in 1 4 1 2 or 3 4 nominal thicknesses but the actual thickness is often 1 32 thinner. We also carry pre cut project panels that are available in different sizes that may vary by store. The minimum plywood for roofing plywood is layers of wood.

Plywood typically comes in 4 8 ft. A 3 4 sheet is actually 23 32 thick. 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 standard width is 4 feet.

With edge support and the same snow load 3 8 inch osb can be used. 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. Required dimensions of plywood for roofing.

The minimum thickness of plywood used for roofing is 3 8 th of an inch. A roof that lays practically flat will have a much heavier load than a steeper roof that allows rain snow and ice to roll right off. The thickness of plywood used for roof decking depends on the roof slope the spacing of. 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.

Steeper rather than flatter roofs will have lesser load per sq. You can get plywood sheets with a length of up to 10 feet. Because the actual thickness may vary measuring the plywood is the only accurate way to determine its thickness. Many factors affect thickness.

What is the actual thickness of a sheet of plywood.