Flat Roof Plywood Thickness

Rafters that are slightly farther apart might require inch or 5 8 inch thick plywood.

Flat roof plywood thickness.

Most roofs will be sheathed in plywood 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. This kind of plywood can be used on roofs with minimal load. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads.

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. Plywood typically comes in 4 8 ft. Required dimensions of plywood for roofing. 8d ring shank nails should be used instead.

Foot and with a maximum of spacing of. Loads will vary with the pitch of the roof. The most common thickness of plywood is 1 2 inch but plywood thickness can range from 1 8 inch to 3 4 inches. Steeper rather than flatter roofs will have lesser load per sq.

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 s considered to be the minimum. The minimum thickness of plywood used for roofing is 3 8 th of an inch. Whether you re looking for plywood pitched roofing materials flat roofing materials or accessories we ve got everything you ll need.

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. Sheathing should be a minimum of 19 32 inch thick. If you have any. 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. 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. That s considered to be the minimum. The existing plywood on my roof is only 3 8.

The typical thickness range for sheathing is 3 8 to 3 4 inch. Sheet with varying thickness. He said it s only a difference of 1 8 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.