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. Continue to place the field tiles in position on the substrate and firmly apply pressure to the face of the tile while moving the tile back and forth perpendicular to the trowel ridges.Place the first field tiles at the intersection of the layout lines, making sure the tile is properly aligned with both layout lines.Only spread as much mortar as can be covered with tiles before the mortar skins over or loses transfer when touched.If the tiles are larger than 15″ (38cm) 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 and even coat to the surface.Using a notched trowel, spread mortar while holding the trowel at a 45-degree angle to the floor.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. Refer to current Technical Data Sheets on our product pages or contact MAPEI’s Technical Services Department regarding the time required before exposure to adverse weather conditions. The area should be protected from rain, frost and freezing temperatures for several days. Note: Check weather conditions before beginning.
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