Does Bath Floor Need A Sub Floor Board

Excess moisture in the subfloor is a common reason for early replacement of bathroom flooring but it can be prevented by choosing the right material from the beginning.

Does bath floor need a sub floor board.

What is a subfloor. A subfloor is the solid material beneath your floor covering. By choosing the right material from the start your bathroom will stand a better chance of withstanding long term damage. When installing a ceramic tile floor on a concrete subfloor you don t have to worry about flexing as long as the concrete slab is at least 1 1 8 inch thick which most slabs are.

The subfloor is the decking installed on top of flooring joists. The best method is to refasten the subfloor then add a layer of plywood. It supports your decorative floor finish whether it s carpet hardwood vinyl laminate or tile. If the subfloor doesn t have enough stability you can usually but not always remedy the situation by installing cement backer board also called cementboard.

According to backer board manufacturers and tile setters installing backer board directly over an old solid. Would this calculation get me to the right height compressed thin set on top of sub floor 1 8 cement board 1 2 compressed thin set on top of cement board 1 8. It is generically called cement board or backer board or it can also be referred to by one of the common brand names such as densshield hardiebacker and wonderboard. I plan on thinsetting and screwing cement board to the subfloor then redgard then thin set and tile.

Depending on when a home was built a subfloor could be made from softwood boards like pine or fir plywood or osb oriented strand board. A subfloor is the bottom most structural level of your floor. I need to match the height of the existing tile in the bathroom. Wooden subfloors in older houses need to be strengthened and stabilized before backer board and tile are installed.

Typically a subfloor is made of plywood or oriented strand board osb panels. Arrange the plywood on the floor so the joints of this layer do not align with the subfloor joints below. Preparation for installing floor tile depends on the type of subfloor in the room you are tiling. Osb is a composite of glue and strips of scrap wood in.

What size plywood do i use for a subfloor. Cement based backer board. The thickness of plywood. Now largely regarded as the very best underlayment for ceramic tile in any application floors walls and countertops cement based backer board goes by many names.

Allow 1 4 inch gap along the walls and between the joints for expansion.