What Type Of Plywood To Use For Attic Floor

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.

What type of plywood to use for attic floor.

As an alternative 3 4 osb can be used. But there s no real reason to use plywood thinner than 3 4 inch. It might seem impossible to haul it up to the attic. If you re familiar with basic carpentry and framing techniques installing decking for attic storage.

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. I assume 3 4 inch but there are many types brands to choose from. For joists spaced 24 inches oc use thicker inch plywood to prevent sagging between them.

Cut the plywood into manageable strips about 10 inches wide to make the job easier. Some screwed others not. The cost savings is insignificant compared to the extra support offered by the thicker material. I wanted to add more plywood to the area and wanted to know if any specific type i should use.

The building code allows for the use of osb in place of plywood for subflooring. My attic is located above my garage and currently the former owner had random pieces of plywood placed up there.