Plywood Thickness For Bathroom Floor

The bathroom floor gets wet.

Plywood thickness for bathroom floor.

That usually means the underlayment and the subfloor also get wet. The most common thickness of plywood is 1 2 inch but plywood thickness can range from 1 8. 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. When used in flooring plywood functions as the subfloor that supports hardwoods tile and carpet floors.

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. 23 32 cat ps1 09 tongue and groove douglas fir subfloor application as 4 x 8. 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. Item 12182 model 231331.

The subfloor is the decking installed on top of flooring joists. The floor must also handle the weight of the tub shower tiles and other fixtures. 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. Tile floors are especially heavy with layers of cement board mortar tile or stone and grout.

The minimum thickness allowed for ceramic tile installations is two sheets of 5 8 inch thick plywood. Using the right type plywood ensures a long lasting floor. The recommended thickness of the plywood subfloor is governed by the spacing of the joists.