There are many important steps to take before someone can start tiling a bathroom. That all begins with getting rid of the old tiles, as well as any mortar and grout. The surface underneath, whether it’s concrete or a wooden subfloor, must be clean, dry and perfectly smooth. Holes, cracks and imperfections must be repaired. If your tiling project is taking place in a bathroom or other space with extreme moisture, be sure to install whatever special membranes or cement backer board may be required to prevent the growth of harmful moulds and mildews. Finally, the tile layout is pre-planned and the materials are acquired.