From Board To Floor

Use a polymer modified thin set a type of mortar to attach the backer board to the subfloor.

From board to floor.

A very sturdy and strong substrate. To lay your first board use a caulking gun loaded with quick grip adhesive and squirt a line around the back of the board close to its edge. If your floor is going to be 12 feet 3 7 m x 18 feet 5 5 m for instance note that you ll need a total of 4 12 ft 3 7 m boards and 4 18 ft 5 5 m boards for the outer frame as well as multiple 18 ft 5 5 m boards cut to size to serve as the main floor joists. I ve installed 1 2 cement board wonder board over 3 4 hardwood floor.

The backer board comes in different sizes and you will pick the right one depending on the type of floor you are installing. I started by placing 30 roofing paper to act as bond break to avoid squeaks before installing the cement board being sure to stagger joints. To achieve the ideal flat surface most contractors rely on the backer board cement backer board is a thin layer of concrete designed to be setting surface upon which tile can be installed. From here you can create another perimeter of adhesive further in towards the centre of the board.

Fasten the backer board to the floor using proper nails or screws as recommended by the manufacturer every 8 around the perimeter and all supporting the studs. Keep fasteners between 3 8 and 3 4 from sheet edges and 2 in from sheet corners. Bathroom floor roughly 8 8 going to use roughly a little less than 3 sheets of cement board. Install a cement based backer board following the manufacturer s instructions.

This provides a solid surface under the tile that prevents flexing that could lead to cracking. The two types of subfloor material oriented strand board osb and plywood are both constructed of wood fibers combined with glue and pressed into durable panels that are more than adequate for. The floor is pretty level as is so was considering not using thinset.