How Thick Is Plywood On Roof

Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

How thick is plywood on roof. Plywood typically comes in 4 8 ft. That s considered to be the minimum. 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. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick.

Foot and with a maximum of spacing of 16 inches between rafters. A 3 4 sheet is actually 23 32 thick. Steeper rather than flatter roofs will have lesser load per sq. 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 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. Never attach roof sheathing with staples. 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 thickness for the roof. If your roof is more on the flatter side then it s. Severe weather 1 2 in common douglas fir plywood sheathing application as 4 x 8.

One of the most important factors when selecting the plywood for your roof is how thick each piece should be. 8d ring shank nails should be used instead. The existing plywood on my roof is only 3 8. 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. 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. Sheet with varying thickness. He said it s only a difference of 1 8 thickness.

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. The typical thickness range for sheathing is 3 8 to 3 4 inch. Because the actual thickness may vary measuring the plywood is the only accurate way to determine its thickness.