Thickness Of Roof Plywood

You can get plywood sheets with a length of up to 10 feet.

Thickness of roof plywood.

Many factors affect thickness. The most common thickness of plywood is 1 2 inch but plywood thickness can range from 1 8 inch. Because the actual thickness may vary measuring the plywood is the only accurate way to determine its thickness. 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. 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. A 1 2 sheet is actually 15 32 thick. 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. A 3 4 sheet is actually 23 32 thick. The minimum thickness of plywood used for roofing is 3 8 th of an inch.

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. The standard width is 4 feet. In this case plywood should be a minimum of 3 8 inch 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 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. However you may need to consider bolstering the plywood thickness for a roof that has a higher load.

You might be tempted to choose a inch thickness although it s unnecessary in most cases. The most common size for plywood sheets is 4 x 8 feet followed by 5 x 5 feet. An exception to this standard however may occur if you intend to install slate concrete or tile shingles on your roof. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb.

Steeper rather than flatter roofs will have lesser load per sq.