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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, unfortunately, it is normal for wall and floor tiles to crack, especially when you drop heavy items on tiled floors or place heavy objects on them. Tiles are also more susceptible to cracking when ceramic tiles designed for walls are installed on floors, as these are often not strong enough to handle heavy loads from foot traffic and furniture. Similarly, tiles that are installed incorrectly, lack adequate subflooring, or have other installation problems are prone to cracking. To avoid these problems and the inevitable repair and replacement costs they bring, always hire a professional for tile work and follow best practices for 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.

When working on your bathroom floor tiling, you should always tile the floor first and then refit the toilet afterward. This has both practical and visual advantages—the tile will have a better seal, and the installation will look cleaner.

On the other hand, when you try to cut the tiles to fit around the toilet, you’re putting yourself at a disadvantage. It’s a lot more work, it’s hard to be precise, and mistakes or miscalculations can lead to future moisture damage to the tiling, grout, and subfloor.