Use your spirit level to make sure the tiles are all level. If not, then you can use the rubber mallet to gently tap tiles into place – it must be a rubber mallet, otherwise you run the risk of cracking your brand-new tiles. Once you reach the edge, start from the middle tile and make another row at a right angle to your first row – this is your first quarter. When you reach the edge, you will likely have a gap.
Fill in the tiles between the two rows of tiles you have made and then create another row. You might have surplus adhesive in your tiling area that you can scrape away with the trowel. Fill in the gap between your new row and the first quarter and create another row. Fill this in, create another row and fill that in.
You should have an even border of space around your main tile body. This is where you will need the tile cutter. Measure the size of the edge tiles by placing a tile on top of an outer tile and then placing another tile on top of this tile, but with the outer edge against the wall. You can then mark on the first loose tile by drawing a line using the inner edge of the second loose tile. Cutting just before this will give you the extra space needed for the grout.
Cut the tiles as per your tile cutter’s instructions and make sure to wear your goggles and mask, because it will kick up a lot of dust. Then, instead of applying adhesive to the floor, apply it directly to the cut tiles and place them right up against the wall. Leave to set.