As long as you follow the instructions on your peel-and-stick tile packaging, it should not damage your walls. A possible instance when you may accidentally damage your walls is if you install tiles improperly using additional adhesives that aren’t recommended.

Also, you can damage your walls if you’re not careful when removing tile. For example, you could accidentally make holes in the drywall with a paint scraper if you don’t heat the adhesive long enough before trying to pry it off.

Add a T-shaped spacer to each corner of a tile when placing it. You’ll want to nudge the tiles closer together so the spacers are touching each corner. When you’re done installing your tile, you can remove each spacer, wash them, and use them for your next project.

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.

There are no unbreakable rules of design, but experts recommend against using large tiles in areas with poor subflooring where they’re more prone to cracking, in areas where the floor isn’t entirely level, over raised areas or dips, and in bathrooms where budget is the primary concern. The size of your bathroom shouldn’t be a reason not to use large tiles; in fact, larger tiles, also known as slab tiles, can be a modern and sleek choice for bathroom floors and walls.