Plywood Thickness For Bathroom Floor

23 32 cat ps1 09 tongue and groove douglas fir subfloor application as 4 x 8.

Plywood thickness for bathroom floor.

The floor must also handle the weight of the tub shower tiles and other fixtures. 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. The bathroom floor gets wet.

Tile floors are especially heavy with layers of cement board mortar tile or stone and grout. Item 12182 model 231331. The finished floor is then installed on top of the subfloor. The subfloor is the decking installed on top of flooring joists.

When used in flooring plywood functions as the subfloor that supports hardwoods tile and carpet floors. 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. Using the right type plywood ensures a long lasting 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. That usually means the underlayment and the subfloor also get wet. The recommended thickness of the plywood subfloor is governed by the spacing of the joists.