That s a big size and strength difference between the two types of attic joists even if the joist spacing is the same.
Plywood attic ceiling.
Osb sheets plywood of 3 4 thickness screws and nails.
Ceiling joists are typically 2 8 lumber floor joists are usually 2 10 or 2x 12 lumber.
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.
Read on more to know how to go about finishing the attic walls and ceiling professionally.
If the attic were designed as living space those ceiling joists would become floor joists and be much bigger.
The plywood will create a smooth strong ceiling without having to apply drywall tape and mud to the ceiling.
Plywood serves capably as ceiling material in garages shops and rec rooms when aesthetic design is not an issue.
You can install inch plywood or oriented strand board osb in 4 foot by 8 foot panels over existing 16 inch oc joists.
Some ceilings that appear to be beadboard are actually routed plywood.
You will require paint insulation and boards in 2by4 dimensions.
The essential tools required.
Materials required for finishing the attic walls and ceiling.
Plywood allows easier access to pipes ducts and wiring than drywall.
Run the plywood down to the top of the knee wall.