Installation Techniques for Large Format Tile
Installation Techniques for Large Format Tile
Installing LFT requires careful handling to avoid lippage and ensure full coverage. The key steps: apply mortar with the flat side of the trowel to key it into the substrate, then comb with the notched side in one direction. Back-butter the tile with a thin layer of mortar and comb it in the same direction as the substrate trowel lines to allow air to escape. Place the tile with a slight twisting motion to collapse the ridges. Use a tile leveling system (see domain 5) to hold tiles flush. Check coverage by periodically lifting a tile. For large tile, use suction cups or a tile lifting frame. Traps: not back-buttering; combing mortar in different directions on substrate and tile (trapping air); using too little mortar; and failing to check coverage. Worked example: For a 24x48 tile, use a 1/2-inch notch trowel on the substrate and a 1/4-inch notch on the back of the tile, combed in the same direction. This ensures proper coverage and minimizes voids. After placing, tap with a rubber mallet and check for hollow spots.