What Type Of Plywood To Use For Attic Floor

But there s no real reason to use plywood thinner than 3 4 inch.

What type of plywood to use for attic floor.

For joists spaced 24 inches oc use thicker inch plywood to prevent sagging between them. The building code allows for the use of osb in place of plywood for subflooring. Plywood comes in large sheets. Some screwed others not.

I assume 3 4 inch but there are many types brands to choose from. 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. I wanted to add more plywood to the area and wanted to know if any specific type i should use. Cut the plywood into manageable strips about 10 inches wide to make the job easier.

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

The cost savings is insignificant compared to the extra support offered by the thicker material. If you re familiar with basic carpentry and framing techniques installing decking for attic storage.