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.

Yes. You can tile over tile if the old tile is in good shape, but this will also create a thicker floor. As a result, you may have to remove and readjust baseboards and other room trimmings and potentially even raise door heights to work with the higher floors. In most projects, it’s best to remove the old tile before installing a new tile floor.

Silicone caulk shouldn’t be used in place of grout because each material serves its own purpose. Thanks to its flexibility, silicone caulk is good for sealing around the perimeter of tiled floors, where movement and expansion might occur. However, grout is more durable, making it a better option for the joints in between tiles, which need to withstand constant weight and foot traffic.

Yes, provided you aren’t installing drywall over it. But you can skim coat it, apply new tile right on top, paint it, or stencil it. For more budget- and DIY-friendly options, you can install beadboard or apply decals. Just make sure that the current tiles are in good condition and prepped well for the paint or adhesive to stick.