Floor tiles are usually ½ to ¾ inch thick and attached to a wood or concrete subfloor with mortar. Grout fills the gaps between tiles.
A tile floor can last 100 years or more. A flat, stable, dry subfloor prevents cracking. Grout is porous, so water can stain it, and dampness encourages mold. If water gets through, it can damage the subfloor.
Lifespan: 100+ years
Step 1: Check for uneven or cracked tiles, and bouncy or spongy areas. These problems are often caused by a failing subfloor or improper installation. If you find these issues, have a professional take a look.
Step 2: Check for missing or loose tiles and repair or replace them. Secure tiles sound solid when tapped with your finger. Loose ones sound hollow. A hollow sound could indicate an issue with the mortar or the subfloor.
Step 3: Check the grout between tiles for gaps, cracks, or wear. Repair these issues right away to prevent problems with the tile and the subfloor.
Step 4: Stained or damp sections of grout could mean you have a water issue. Dampness can lead to mold. Repair any ongoing leak ASAP. If the room smells earthy or musty, or you see stains on the floor or walls, you may have a mold problem.