Flat Roof Plywood Thickness

That s considered to be the minimum.

Flat roof plywood thickness.

The typical thickness range for sheathing is 3 8 to 3 4 inch. That s considered to be the minimum. Roof decking is the material that lies on top of the main roofing structure and the underlayment and roof covering is applied on top. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads.

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. 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. I thought perhaps he made a mistake but no this is what he is proposing. Foot and with a maximum of spacing of.

The minimum thickness of plywood used for roofing is 3 8 th of an inch. This kind of plywood can be used on roofs with minimal load. Steeper rather than flatter roofs will have lesser load per sq. He said it s only a difference of 1 8 thickness.

Rafters that are slightly farther apart might require inch or 5 8 inch thick plywood. The most common thickness of plywood is 1 2 inch but plywood thickness can range from 1 8 inch to 3 4 inches. A local roofer submitted a proposal to me for a roof placement that included replacing rotten plywood with 1 2 cdx. Sheathing should be a minimum of 19 32 inch thick.

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. 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.

If you have any. Required dimensions of plywood for roofing. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. 8d ring shank nails should be used instead.

Whether you re looking for plywood pitched roofing materials flat roofing materials or accessories we ve got everything you ll need. Never attach roof sheathing with staples. In roofing plywood can be used as roof decking. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick.