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.

I assume 3 4 inch but there are many types brands to choose from. I wanted to add more plywood to the area and wanted to know if any specific type i should use. As an alternative 3 4 osb can be used. If you re familiar with basic carpentry and framing techniques installing decking for attic storage.

In that case you will need to use 3 4 thick plywood. 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. Plywood comes in large sheets.

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. For joists spaced 24 inches oc use thicker inch plywood to prevent sagging between them. Some screwed others not. It might seem impossible to haul it up to the attic.

The building code allows for the use of osb in place of plywood for subflooring. 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.