How Thick Is Plywood On Roof

That s considered to be the minimum.

How thick is plywood on roof.

Sheet with varying thickness. Never attach roof sheathing with staples. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. 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.

I thought perhaps he made a mistake but no this is what he is proposing. Plywood typically comes in 4 8 ft. One of the most important factors when selecting the plywood for your roof is how thick each piece should be. The typical thickness range for sheathing is 3 8 to 3 4 inch.

Steeper rather than flatter roofs will have lesser load per sq. Foot and with a maximum of spacing of 16 inches between rafters. Sheathing should be a minimum of 19 32 inch thick. 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.

A local roofer submitted a proposal to me for a roof placement that included replacing rotten plywood with 1 2 cdx. What is the actual thickness of a sheet of plywood. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. 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.

If your roof is more on the flatter side then it s. Plywood is often sold in 1 4 1 2 or 3 4 nominal thicknesses but the actual thickness is often 1 32 thinner. Like most other things there is no one right answer for the plywood thickness of your roof. He said it s only a difference of 1 8 thickness.

A 3 4 sheet is actually 23 32 thick. This kind of plywood can be used on roofs with minimal load. Plywood thickness for the 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.

8d ring shank nails should be used instead. Because the actual thickness may vary measuring the plywood is the only accurate way to determine its thickness. Severe weather 1 2 in common douglas fir plywood sheathing application as 4 x 8.