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Start the project with clean drywall/backer board. Starting at the bottom base of the wall, spread thinset with a trowel on the first section of the wall. Tip: You can choose to create vertical or horizontal bands of tile, based on which grout line you make thicker. In this project, we are creating horizontal bands of tile.
Set 1/4” spacers at the base of the wall and lay the porcelain tile on the spacers horizontally along the wall, pushing the tile firmly into the thinset. Continue laying tile from left to right, creating almost credit-card-thin vertical grout joints.
Next, set 1/4” spacers on top of the first row, and lay the next row of tile the same as the first (Image 1). Continue tiling from left to right, creating tight grout joints (Image 2). As you work your way up rows, you will notice the banding effect the 1/4” spacers make with the long tiles. Because tile is 24” long, occasionally check that the rows are level as you tile.