Roof Deck Plywood Thickness

Your local code may require you to use 5 8 or some other thickness.

Roof deck plywood thickness.

The minimum plywood for roofing plywood is layers of wood. Many factors affect thickness. Plywood is made with three or more layers of thin wood glued together with the grain. It s the standard for spacing of 24 inches in the rafter although as mentioned a 5 8 inch thick is more ideal.

However you may need to consider bolstering the plywood thickness for a roof that has a higher load. What is plank sheathing. The ideal thickness for the standard rafter spacing of 24 inches is 5 8 th of an inch. Plank sheathing usually 1 6 or 1 8 was used as a roof deck before plywood.

I would use 1 2 with clips in between the rafters if your centers are 24. The standard width is 4 feet. If the plywood thickness is less than or the osb less than 7 16 it is going to be weak with the roof rafters spaced the standard 2 on center. The thickness of plywood used for roof decking depends on the roof slope the spacing of.

Osb that is made now holds up better than the old stuff used to. Foot and with a maximum of spacing of 16 inches between rafters. The minimum thickness of plywood used for roofing is 3 8 th of an inch. You can get plywood sheets with a length of up to 10 feet.

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