If you’re tiling the walls and floor of the same room, most contractors recommend tiling walls before starting on the floor. This way, you’re not working on a newly tiled floor and potentially scratching it as you tile the walls. By starting with the walls, you are also saving yourself some time by not having to wait on the floor to set before starting. In practice, people often install all wall tiles except for the bottom row, then install the floor tiles, and finally cut the last row of wall tiles to fit over the floor. However, you can install the entire wall first if you wish.