How Thick Is Plywood On Roof

This minimum will only work if the rafters are set 16 inches apart at most and if the roof doesn t have too much load.

How thick is plywood on roof.

The minimum thickness of plywood used for roofing is 3 8 th of an inch. He said it s only a difference of 1 8 thickness. The existing plywood on my roof is only 3 8. If your roof is more on the flatter side then it s.

This kind of plywood can be used on roofs with minimal load. A local roofer submitted a proposal to me for a roof placement that included replacing rotten plywood with 1 2 cdx. Plywood typically comes in 4 8 ft. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

Steeper rather than flatter roofs will have lesser load per sq. Foot and with a maximum of spacing of 16 inches between rafters. Plywood thickness for the roof. When used for roofing plywood panels are covered and protected by a variety of building materials that keep the elements at bay including roof felt underlayment flashing and shingles.

Plywood is often sold in 1 4 1 2 or 3 4 nominal thicknesses but the actual thickness is often 1 32 thinner. 8d ring shank nails should be used instead. The typical thickness range for sheathing is 3 8 to 3 4 inch. Never attach roof sheathing with staples.

Like most other things there is no one right answer for the plywood thickness of your roof. The most common plywood uses include support for floors walls roofs and garages in residential construction. Sheathing should be a minimum of 19 32 inch thick. Sheet with varying thickness.

One of the most important factors when selecting the plywood for your roof is how thick each piece should be. 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 design. The thickness of plywood used for roof decking depends on the roof slope the spacing of rafters and the weight of other material to be put over the decking as well as the design load the. That s considered to be the minimum.

What is the actual thickness of a sheet of plywood. I thought perhaps he made a mistake but no this is what he is proposing. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick.