How Thick Of Plywood For A Roof

A local roofer submitted a proposal to me for a roof placement that included replacing rotten plywood with 1 2 cdx.

How thick of plywood for a roof.

Is 1 2 osb okay for a standing seam roof and other roofing materials or is 5 8 preferred. What thickness of plywood for shed roof. He said it s only a difference of 1 8 thickness. One of the most important factors when selecting the plywood for your roof is how thick each piece should be.

Sheathing should be a minimum of 19 32 inch thick. Snowfall and ice accumulation can affect the load put on a roof. Can someone direct me to blogs or q a titles that address roof sheathing thickness. The existing plywood on my roof is only 3 8.

My cabin trusses will be 24 oc and i will use either 1 2 or 5 8 osb sheathing and a standing seam metal roof. The typical thickness range for sheathing is 3 8 to 3 4 inch. The cabin is just 440 sf and is in zone 6. Standard roof sheathing which consists of 4 by 8 sheets of plywood or oriented strand board or osb is 1 2 inch thick and attaches directly to the roof rafters or the roof trusses.

The thickness of plywood used for roof decking depends on the roof slope the spacing of rafters and the weight of other material to be put over the decking as well as the design load the. 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. For the less standard 20 inch apart rafters plywood with inch or 5 8 th inch thickness can be used.

That s considered to be the minimum. Plywood thickness for the roof. The work is in building it collecting the material etc so i take the view that the extra cost is small compared to the work effort. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick.

An exception to this standard however may occur if you intend to install slate concrete or tile shingles on your roof. 8d ring shank nails should be used instead. I thought perhaps he made a mistake but no this is what he is proposing. However 3 4 th inch plywood is also used for a roofing system that has a heavier load.

Roof will be fully vented. 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.