Flat Roof Plywood Thickness

The most common thickness of plywood is 1 2 inch but plywood thickness can range from 1 8 inch to 3 4 inches.

Flat roof plywood thickness.

That s considered to be the minimum. Most roofs will be sheathed in plywood at least 3 8 inch thick. That s considered to be the minimum. Never attach roof sheathing with staples.

If you have any. 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. Sheathing should be a minimum of 19 32 inch thick. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

In roofing plywood can be used as roof decking. Whether you re looking for plywood pitched roofing materials flat roofing materials or accessories we ve got everything you ll need. A local roofer submitted a proposal to me for a roof placement that included replacing rotten plywood with 1 2 cdx. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads.

Required dimensions of plywood for roofing. 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. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick.

This kind of plywood can be used on roofs with minimal load. 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. A roof that lays practically flat will have a much heavier load than a steeper roof that allows rain snow and ice to roll right off. Loads will vary with the pitch of the roof.

Foot and with a maximum of spacing of. I thought perhaps he made a mistake but no this is what he is proposing. The existing plywood on my roof is only 3 8. Rafters that are slightly farther apart might require inch or 5 8 inch thick plywood.

Steeper rather than flatter roofs will have lesser load per sq. Sheet with varying thickness. 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. Plywood typically comes in 4 8 ft.