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You can put hot pans on porcelain countertops. Porcelain is highly resistant to heat—it’s manufactured at around 2,500 degrees Fahrenheit, so it can withstand a ton of heat without cracking or damaging. Even though the high heat is a plus, you should still be cautious when putting hot surfaces on porcelain countertops.

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.

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.

For best results, you should remove the toilet in a bathroom before removing tile or installing new tile. If you don’t remove the toilet, it will be harder to fully waterproof the tile around the toilet, which could increase the risk of mold growth or plumbing leaks. If you have trouble removing the toilet, hire a plumber to help.