The building code allows for the use of osb in place of plywood for subflooring.
What type of plywood to use for attic floor.
My attic is located above my garage and currently the former owner had random pieces of plywood placed up there.
But there s no real reason to use plywood thinner than 3 4 inch.
If you re familiar with basic carpentry and framing techniques installing decking for attic storage.
Cut the plywood into manageable strips about 10 inches wide to make the job easier.
I assume 3 4 inch but there are many types brands to choose from.
The cost savings is insignificant compared to the extra support offered by the thicker material.
As an alternative 3 4 osb can be used.
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 wanted to add more plywood to the area and wanted to know if any specific type i should use.
It might seem impossible to haul it up to the attic.
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.
Some screwed others not.
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.