Installing Backerboard on Floors
Spread thinset on the subfloor, lower the tile backerboard into place, and secure with nails or screws.
After cutting the backerboard to size, spread latex-modified thinset on top of the wood subfloor (or prepared vinyl floor) with a 1/4-in. by 1/4-in. notched trowel 1. Carefully lower the backerboard onto the thinset and press in place 2. Use either nails or screws to fasten the sheet to the wood floor, making sure you use enough fasteners (see the specifications for the backerboard). Some sheets have a nailing pattern embossed on the surface for you to follow 3. If you are working under a toekick, use the side of the hammer to drive nails 4. Omitting nails here can lead to a loose substrate, and problems with the tile later on. Continue adding sheets, as necessary, until the entire floor is covered 5. Then tape every joint with fiberglass tape 6‚ and cover with a thin layer of thinset, using the flat side of the trowel to embed it fully 7.
|TRADE SECRET: Splitting a full-size sheet of backerboard in two makes it easier to carry and install and will help you avoid dinging cabinets and walls as you work.