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No, you don’t need to remove the old grout before installing new tile over existing tile. In fact, the old grout helps fill in gaps between tiles, creating a more even surface for the new layer. However, it's important to ensure that the grout is clean, solid, and free of cracks or crumbling areas. Damaged grout should be repaired or replaced before proceeding. Cleaning the surface thoroughly and filling any low spots will help the new adhesive bond properly and ensure a smooth, stable installation.

Yes, it’s always a good idea to keep a box or two of spare tiles after a home renovation project. Tiles can crack from improper installation, heavy foot traffic, and impact from drops. Having some extra tile on hand can make replacement fast, easy, and affordable. Plus, some manufacturers might discontinue particular colors or styles, and slight variations in tile colors between batches could mean mismatched tiles even if your product isn’t discontinued. Having a few spare tiles in storage can help avoid these issues, as well.

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.

You can technically install tile over tile, but we don’t suggest it. Installing tile over any surface that isn’t a completely flat and prepared subfloor will result in a shoddy overall job, uneven flooring, tiles that don’t adhere, extra weight, gaps, cracks, and room for moisture and dirt to enter. For the best results, only install new tile on a flat, sanded surface like subflooring or concrete that is prepared for tile.

If you have asbestos tile and would rather tile over it than remove it, or if your existing tile is completely flat and bonded tightly to the floor, you may be able to tile over existing tile. But experts recommend thinking twice before you do.