Roof Thickness Plywood

What is the actual thickness of a sheet of plywood.

Roof thickness plywood.

Many factors affect thickness. Steeper rather than flatter roofs will have lesser load per sq. 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. A 3 4 sheet is actually 23 32 thick.

Plywood is often sold in 1 4 1 2 or 3 4 nominal thicknesses but the actual thickness is often 1 32 thinner. The minimum thickness of plywood used for roofing is 3 8 th of an inch. Plywood is made with three or more layers of thin wood glued together with the grain. The thickness of plywood used for roof decking depends on the roof slope the spacing of.

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. Sheet with varying thickness. You might be tempted to choose a inch thickness although it s unnecessary in most cases.

This kind of plywood can be used on roofs with minimal load. 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 most common size for plywood sheets is 4 x 8 feet followed by 5 x 5 feet. We also carry pre cut project panels that are available in different sizes that may vary by store.

Required dimensions of plywood for roofing. In this case plywood should be a minimum of 3 8 inch thick. However you may need to consider bolstering the plywood thickness for a roof that has a higher load. The minimum plywood for roofing plywood is layers of wood.

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 can get plywood sheets with a length of up to 10 feet. The standard width is 4 feet. It s the standard for spacing of 24 inches in the rafter although as mentioned a 5 8 inch thick is more ideal.

With edge support and the same snow load 3 8 inch osb can be used.