The building code allows for the use of osb in place of plywood for subflooring.
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.
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.
Cut the plywood into manageable strips about 10 inches wide to make the job easier.
Some screwed others not.
It might seem impossible to haul it up to the attic.
My attic is located above my garage and currently the former owner had random pieces of plywood placed up there.
I wanted to add more plywood to the area and wanted to know if any specific type i should use.
The cost savings is insignificant compared to the extra support offered by the thicker material.
For joists spaced 24 inches oc use thicker inch plywood to prevent sagging between them.
In that case you will need to use 3 4 thick plywood.
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.
Plywood comes in large sheets.
I assume 3 4 inch but there are many types brands to choose from.