How Thick Is Roofing Plywood

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

How thick is roofing plywood.

This kind of plywood can be used on roofs with minimal load. If your roof is more on the flatter side then it s. That s considered to be the minimum. 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.

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

The most common thickness of plywood is 1 2 inch but plywood thickness can range from 1 8 inch to 3 4 inches. When used in flooring plywood functions as the subfloor that supports hardwoods tile and carpet floors. Never attach roof sheathing with staples. He said it s only a difference of 1 8 thickness.

Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. A local roofer submitted a proposal to me for a roof placement that included replacing rotten plywood with 1 2 cdx. 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. Like most other things there is no one right answer for the plywood thickness of your 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. Steeper rather than flatter roofs will have lesser load per sq. Plywood thickness for the roof. The existing plywood on my roof is only 3 8.

Most roofs will be sheathed in plywood at least 3 8 inch thick. The ideal thickness for the standard rafter spacing of 24 inches is 5 8 th of an. 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. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads.

Sheathing should be a minimum of 19 32 inch thick.