Tile Spacers Spacers are used when tiling a wall, to make sure the tiles are evenly spaced, in straight lines, and that the grout between the tiles is of even thickness. In this investigation, we will start by looking at square tiles, and the three types of spacers we will use are T shaped ┬ L shaped └ and cross shaped + The investigation is to see how many spacers are needed for different arrangements of tiles. Start with putting up tiles in a straight line, then look at two rows of tiles, then three rows of tiles. Put your results into a table showing the arrangement of tiles, the number of each type of spacer used, and the total number of spacers used.