Apply it to the wall with the bottom edge about 1 4 in.
Tile backer board detail.
Use 1 4 inch backer board on curved applications or on vertical surfaces such as fireplaces.
Thick 3 x 5 ft.
Just before tiling fill the joints with thinset and cover with 2 inch wide fiber mesh tape unless the adhesive manufacturer recommends otherwise.
Then apply a generous amount of thin set to the bottom bathtub tile and position it 1 8 in.
Use 5 8 inch backer board as a fire rated material similar to type x drywall.
It s typically available in 1 2 in.
Joint details for cement backerboard under tile.
Cement board detail the best approach when installing cement board or other tile backer around a tub is to keep the cement board out of the lip area.
Its made from cement and sand and is reinforced by fiberglass mats on both sides so it s impervious to water.
Above the lip of the tub.
Cement board is the most durable trouble free tile backer for tub surrounds showers floors and all other wet areas.
Durock glass mat tile backerboard combines the tile bond of cement board with the handling and ease of use of a sheetrock brand panel.
Leave a 1 8 to 3 16 inch gap between adjoining sheets of backerboard and at edges.
Durock glass mat tile backerboard consists of a treated water resistant gypsum core that is covered with a coated fiberglass mat facer and back and has a proprietary surface making it ideal for use in wet areas as a tile substrate.