What Type Of Plywood To Use For Attic Floor

Don t use 7 16 osb as it is intended for external sheathing and isn t strong enough to be used as a floor.

What type of plywood to use for attic floor. If your plywood subfloor is too thin it might not cope with the load and it might creak or squeak when you walk on it. Cut the plywood into manageable strips about 10 inches wide to make the job easier. The national wood flooring association recommends a minimum plywood panel thickness of 7 8 inch for joist spans of 19 2 to 24 inches and a minimum plywood panel thickness of 5 8 inch for joist spans of 16 inches or less. My attic is located above my garage and currently the former owner had random pieces of plywood placed up there.

The decision regarding the thickness of plywood to use for the subfloor in the attic has a lot to do with how you intend to use the attic and it also depends on the spacing of the ceiling joists. It might seem impossible to haul it up to the attic. I assume 3 4 inch but there are many types brands to choose from. Some screwed others not.

The building code allows for the use of osb in place of plywood for subflooring. As an alternative 3 4 osb can be used. For joists spaced 24 inches oc use thicker inch plywood to prevent sagging between them. But there s no real reason to use plywood thinner than 3 4 inch.

In that case you will need to use 3 4 thick plywood. I wanted to add more plywood to the area and wanted to know if any specific type i should use.