Measure the space to determine how much backer board is necessary. Multiply this number by five percent to account for mistakes and unusable pieces.
Install a vapor barrier of either polyethylene or asphalt-backed paper to prevent moisture damage between the wall or sub-floor and the backer board.
Clean the installation area to make it free of dust, dirt and debris. Use a vacuum to make sure everything is completely removed.
Cut pieces of the backer board to fit the space. This can be done in different ways. Use a hand-tool with a carbide tip and score along your measured marks, applying pressure until the cut breaks clean. Use a diamond or carbide blade when cutting backer board with jigsaws or circular saws.
Fasten the backer board to the wall or sub-floor. Use corrosion-resistant screws or nails to attach the backer board to the wall studs or sub-floor.
Seal the joints. Use an alkali-resistant tape, followed by a layer of thin-set mortar.
Things You Will Need
- Carbide-tipped hand tool
- Corrosion-resistant screws
- Alkali-resistant tape
- Thin-set mortar
- Always measure twice. Doing so will result in less loss of material because of incorrect measurements.
- Allow the thin-set mortar to dry for at least 24 hours before beginning tile installation.
- Mark your stud locations along the floor or the ceiling to make installation of backer board much easier.