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.

Plywood thickness for bathroom floor.

The minimum thickness allowed for ceramic tile installations is two sheets of 5 8 inch thick plywood. The floor must also handle the weight of the tub shower tiles and other fixtures. When used in flooring plywood functions as the subfloor that supports hardwoods tile and carpet floors. The subfloor is the decking installed on top of flooring joists.

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. The thickness of plywood panels in a subfloor is regulated by the. The bathroom floor gets wet. 23 32 cat ps1 09 tongue and groove douglas fir subfloor application as 4 x 8.

The recommended thickness of the plywood subfloor is governed by the spacing of the joists. 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. That usually means the underlayment and the subfloor also get wet. The finished floor is then installed on top of the subfloor.

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. Tile floors are especially heavy with layers of cement board mortar tile or stone and grout. Using the right type plywood ensures a long lasting floor.