How Thick Is Roofing Plywood

He said it s only a difference of 1 8 thickness.

How thick is roofing plywood.

The most common thickness of plywood is 1 2 inch but plywood thickness can range from 1 8 inch to 3 4 inches. That s considered to be the minimum. 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.

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. A local roofer submitted a proposal to me for a roof placement that included replacing rotten plywood with 1 2 cdx. When used in flooring plywood functions as the subfloor that supports hardwoods tile and carpet floors. 8d ring shank nails should be used instead.

Plywood thickness for the roof. Sheathing should be a minimum of 19 32 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. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick.

Never attach roof sheathing with staples. The ideal thickness for the standard rafter spacing of 24 inches is 5 8 th of an. Foot and with a maximum of spacing of 16 inches between rafters. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads.

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

Most roofs will be sheathed in plywood at least 3 8 inch thick. Like most other things there is no one right answer for the plywood thickness of your roof. If your roof is more on the flatter side then it s. 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.

Loads will vary with the pitch of the roof.