What Type Of Plywood To Use For Attic Floor

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.

What type of plywood to use for attic floor.

Cut the plywood into manageable strips about 10 inches wide to make the job easier. Some screwed others not. In that case you will need to use 3 4 thick plywood. If you re familiar with basic carpentry and framing techniques installing decking for attic storage.

The cost savings is insignificant compared to the extra support offered by the thicker material. 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. Plywood comes in large sheets.

My attic is located above my garage and currently the former owner had random pieces of plywood placed up there. As an alternative 3 4 osb can be used. The building code allows for the use of osb in place of plywood for subflooring. It might seem impossible to haul it up to the attic.

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