Plywood Thickness For Bathroom Floor

Using the right type plywood ensures a long lasting floor.

Plywood thickness for bathroom floor.

Plywood makes up most of the walls and floors in attics and are sometimes found in laundry rooms closets and other unfinished areas in the home. The plywood must be exterior grade for all wet areas and it has to be installed in such a way that the joints between each layer do not line up using what is known as a stagger pattern to keep the pieces from ever lining up. The bathroom floor gets wet. When used in flooring plywood functions as the subfloor that supports hardwoods tile and carpet floors.

23 32 cat ps1 09 tongue and groove douglas fir subfloor application as 4 x 8. The most common thickness of plywood is 1 2 inch but plywood thickness can range from 1 8. That usually means the underlayment and the subfloor also get wet. The finished floor is then installed on top of the subfloor.

The thickness of plywood panels in a subfloor is regulated by the. The minimum thickness allowed for ceramic tile installations is two sheets of 5 8 inch thick plywood. Tile floors are especially heavy with layers of cement board mortar tile or stone and grout. The subfloor is the decking installed on top of flooring joists.

The national wood flooring association recommends a minimum plywood panel thickness of 7 8 inch for joist spans of 19 2 to 24 inches and a minimum plywood panel thickness of 5 8 inch for joist spans of 16 inches or less. The recommended thickness of the plywood subfloor is governed by the spacing of the joists. Some experts suggest that 15 32 inch plywood should be standard if the underlying floor joists are spaced 16 inches apart or less but slightly thicker 3 4 inch plywood should be used for joists spaced further apart.