Attic Plywood Size

Ensuring adequate insulation under the flooring.

Attic plywood size.

Attic access panels serve as an important safety and convenience feature in the home. To give yourself enough space to ensure adequate insulation under the flooring construct a riser of 2 x 4 s in the attic over the existing joists. Ceiling joists are typically 2 8 lumber floor joists are usually 2 10 or 2x 12 lumber. Oversizing is an unnecessary expense but you don t want to fall through.

I wanted to add more plywood to the area and wanted to know if any specific type i should use. Some screwed others not. These openings not only allow mechanical and electrical contractors to. Oct 16 2019 what size plywood for an attic floor.

If the attic were designed as living space those ceiling joists would become floor joists and be much bigger. 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. It might seem impossible to haul it up to the attic. The minimum size for an attic s access.

My attic is located above my garage and currently the former owner had random pieces of plywood placed up there. If your attic joists won t bear the weight necessary to finish out a living space but the engineer cleared them to support floor decking for light storage you can install inch plywood or. Cut the plywood into manageable strips about 10 inches wide to make the job easier. If necessary block around them with plywood or corrugated cardboard to prevent the insulation from piling up on the vent.

That s a big size and strength difference between the two types of attic joists even if the joist spacing is the same. The most common size for plywood sheets is 4 x 8 feet followed by 5 x 5 feet. What size plywood for an attic floor. Plywood comes in large sheets.

These project panels help eliminate waste cut costs and are easier to transport than full size panels. I assume 3 4 inch but there are many types brands to choose from. 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. While this is not the optimal setup it is acceptable to have ceiling joists covered with plywood or osb to use for light attic storage of dead loads.

The previous homeowner may have simply covered the joists with plywood to use the space for storage.