Thickness Of Roof Plywood

The most common thickness of plywood is 1 2 inch but plywood thickness can range from 1 8 inch.

Thickness of roof plywood.

Standard roof sheathing which consists of 4 by 8 sheets of plywood or oriented strand board or osb is 1 2 inch thick and attaches directly to the roof rafters or the roof trusses. Many factors affect thickness. We also carry pre cut project panels that are available in different sizes that may vary by store. In this case plywood should be a minimum of 3 8 inch thick.

You might be tempted to choose a inch thickness although it s unnecessary in most cases. A 1 2 sheet is actually 15 32 thick. An exception to this standard however may occur if you intend to install slate concrete or tile shingles on your roof. However you may need to consider bolstering the plywood thickness for a roof that has a higher load.

With edge support and the same snow load 3 8 inch osb can be used. The most common size for plywood sheets is 4 x 8 feet followed by 5 x 5 feet. The standard width is 4 feet. The thickness of plywood used for roof decking depends on the roof slope the spacing of.

This kind of plywood can be used on roofs with minimal load. 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. Because the actual thickness may vary measuring the plywood is the only accurate way to determine its thickness.

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 ideal thickness for the standard rafter spacing of 24 inches is 5 8 th of an inch. The most common scenario is a home that has rafters set approximately 16 inches apart.

Foot and with a maximum of spacing of 16 inches between rafters. Steeper rather than flatter roofs will have lesser load per sq. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb. It s the standard for spacing of 24 inches in the rafter although as mentioned a 5 8 inch thick is more ideal.

Plywood is often sold in 1 4 1 2 or 3 4 nominal thicknesses but the actual thickness is often 1 32 thinner.