![]() Periodically check that the tile lines are level using a carpenter’s level.Firmly apply pressure to the face of the tile while moving the tile back and forth perpendicular to the trowel ridges this helps to ensure that the mortar transfers to the back of the tile and that the tile is in an even plane with adjacent tiles. Building upward, row by row, continue to place the field tiles and decorative accent tiles in position on the substrate.Allow the area to dry until the mortar achieves its initial cure and the tile becomes solidly bonded. This will compromise your waterproofing seal. Note: It is not recommended to screw wood ledger strips into the waterproofing membrane and backerboard. Stacked tiles or a wood ledger board can be used for this purpose. Form a temporary support up to the line of where the second row of tile will start.Note: If using mesh-backed mosaic tile sheets, skip Step 5 and go to Step 6. Only spread as much mortar as can be covered with tiles before the mortar skins over or loses transfer when touched.Back-buttering these shapes can cause cracking. Note: Do not back-butter ceramic tile with curved surfaces such as chair rails and rounded, decorative listellos. If tiles larger than 15″ (38 cm) are used on any side, back-butter tiles before setting them to provide uniform mortar coverage and maximum support. Follow immediately with more mortar and “comb” the mortar in one direction, using the notched side of the trowel to achieve an even-setting bed. First, using the straight (flat) side of the trowel, apply a thin, even coat to the surface.Using a notched trowel, spread mortar while holding the trowel at a 45-degree angle to the wall.Contact MAPEI’s Technical Services Department for guidance if needed. Select a notched trowel size that is appropriate for the size of the tile.Refer to current Technical Data Sheets on our product pages for detailed instructions. ![]() ![]() Mix the mortar according to the instructions on the package. Mark a line where the second row of tile will start.Pre-cut all tiles, with the exception of the bottom row (first row) of tile.Dry-fit all field tiles as well as border and decorative accent tiles.If you are using border tiles or decorative accent tiles, measure and mark lines to indicate these areas.Transfer the markings onto your wall surface and review the placement. Include decorative inserts and accent tile. ![]() Then mark all tile and grout joint measurements on a long wooden dowel rod.
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