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, 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.

Here’s another instance of where the answer is you could, but that doesn’t mean you should. Yes, part of the issue is getting the drywall to stay in place on the tiles, and it’s understandable that screws will crack the tiles and cause them to crumble. That’s why it’s a much better idea to screw drywall into studs, not your porcelain or ceramic tile. But aside from issues with attaching the drywall, it’s also about ensuring a smooth application without trapping moisture inside.

It’s possible to walk on a clay tile roof, but you run the risk of breaking or cracking the tiles if you’re not careful, so it’s best not to walk on it if you can avoid it. If you or a contractor needs roof access, be sure to distribute your weight evenly and step on the portions of tile that are also supported underneath, which depends on your tile design. Walking on any roofing material is inherently dangerous, so wear rubber-soled shoes and use safety equipment if you need to access your roof.