Apply it to the wall with the bottom edge about 1 4 in.
Tile backer board detail.
Joint details for cement backerboard under tile.
Leave a 1 8 to 3 16 inch gap between adjoining sheets of backerboard and at edges.
The most common thickness of tile backer board is 1 2 inch.
Cement board is the most durable trouble free tile backer for tub surrounds showers floors and all other wet areas.
Quarter inch and 5 8 inch thicknesses can also be found.
It s typically available in 1 2 in.
Use 5 8 inch backer board as a fire rated material similar to type x drywall.
Excellent tile adhesion to help protect tile work ease of use and performance hardiebacker cement board s unique cement formulation and structure provide the ideal combination of strength uniform composition and performance that no other backer board can provide.
Durock glass mat tile backerboard combines the tile bond of cement board with the handling and ease of use of a sheetrock brand panel.
Its made from cement and sand and is reinforced by fiberglass mats on both sides so it s impervious to water.
Then apply a generous amount of thin set to the bottom bathtub tile and position it 1 8 in.
Above the lip of the tub.
Use 1 4 inch backer board on curved applications or on vertical surfaces such as fireplaces.
Thick 3 x 5 ft.