Attic Plywood Size

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

Attic plywood size.

Ensuring adequate insulation under the flooring. 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. 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.

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. Some screwed others not. Cut the plywood into manageable strips about 10 inches wide to make the job easier.

Oversizing is an unnecessary expense but you don t want to fall through. In attics built purely for storage purposes you may find 2x6 ceiling joists or in some cases. We also carry pre cut project panels that are available in different sizes that may vary by store. If necessary block around them with plywood or corrugated cardboard to prevent the insulation from piling up on the vent.

If the attic were designed as living space those ceiling joists would become floor joists and be much bigger. 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. I wanted to add more plywood to the area and wanted to know if any specific type i should use. What size plywood for an attic floor.

That s a big size and strength difference between the two types of attic joists even if the joist spacing is the same. These project panels help eliminate waste cut costs and are easier to transport than full size panels. Oct 16 2019 what size plywood for an attic floor. I assume 3 4 inch but there are many types brands to choose from.

Ceiling joists are typically 2 8 lumber floor joists are usually 2 10 or 2x 12 lumber. 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 most common size for plywood sheets is 4 x 8 feet followed by 5 x 5 feet. It might seem impossible to haul it up to the attic.

Install two by four blocking between joists or wherever needed to support edges of the plywood that do not have support from the bottom.