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Thinset mortar is the best adhesive for ceramic tiles on concrete. It is easy to work with and has a slower dry time than mastic or epoxy mortars. This longer dry time gives the installer more time to adjust tiles, which is especially useful for DIYers who may not have tile installation experience. It can also be built up to help level any depressions or gaps in the concrete subfloor.

Yes, provided you aren’t installing drywall over it. But you can skim coat it, apply new tile right on top, paint it, or stencil it. For more budget- and DIY-friendly options, you can install beadboard or apply decals. Just make sure that the current tiles are in good condition and prepped well for the paint or adhesive to stick.

Yes, but you’ll have to use some other type of tool to avoid damaging the tile and possibly injuring yourself. Some alternatives to tile cutters include a glass cutter, angle grinder, and wet saw. Depending on the tile material, you might simply be able to measure and score it with something sharp, like a carbide-tipped pencil, and break it off. Be sure to sand the edge for a smooth installation.

No, when done correctly, removing the tile shouldn’t damage the subfloor. However, if there was pre-existing damage to the subfloor from standard use or lack of maintenance, the subfloor may need repairs. For example, if the contractors notice mold growth on the subfloor or an uneven surface, you may need more extensive services before installing new tile.

If you DIY tile removal, remove the tiles one step at a time, individually removing the tile, grout, and mortar to prevent unnecessarily damaging the subfloor. Depending on the age of your home, consider having a professional inspect the subfloor to ensure it’s in good enough condition to lay new tile.