How to Fix a Chipped or Cracked Tile

A chipped tile is usually cosmetic and fixable. A cracked one is sometimes telling you about something underneath. It is worth working out which you have before doing anything.

Chip or crack

A chip is a piece broken off the surface or an edge, almost always from impact. Something dropped. It is localised and it does not spread.

A crack runs through the tile. A single cracked tile can also be impact, particularly if something heavy landed on it. A crack that runs in a line through several tiles is different. That is movement, and the tiles are showing you where the stress is.

Common causes of a cracked line: a substrate that flexes, a missing movement joint, or a crack in the slab below telegraphing through. Replacing those tiles without dealing with the cause means the crack comes back along the same line.

Filling a small chip

For small surface chips, a colour-matched repair compound or a touch-up product can make the damage much less noticeable.

It works best on matte tiles, where the repair blends. On gloss and polished surfaces the repair is usually visible because it will not match the reflectivity.

It is a cosmetic fix. In a wet area, if the chip has exposed the porous body of a ceramic tile, filling it is a compromise rather than a solution, and replacement is better.

Through-body porcelain is more forgiving, because the colour runs right through, so a chip shows the same colour rather than a contrasting body.

Replacing a single tile

Doable, and much easier if you kept offcuts from the original job. Matching a tile years later without spares is frequently impossible, because ranges are discontinued and shades vary between production runs. This is the practical argument for keeping a box in the garage.

The sequence:

1. Rake out the grout all the way around the tile. This isolates it so the surrounding tiles are not connected to it. Skipping this step is how people crack three tiles trying to remove one.

2. Break the damaged tile from the centre outward. Drill a few holes in the middle, then break it inward toward those holes and work outward. Never lever from an edge against a neighbouring tile.

3. Clean the bed. Remove all the old adhesive back to a flat surface. New adhesive over old ridges will leave the replacement sitting proud, which is more obvious than the chip was.

4. Check the membrane. In a wet area, if the removal has damaged the waterproof membrane underneath, that has to be made good before the new tile goes in. This is the point where a small repair can become a real job, and it is worth knowing before you start.

5. Bed the new tile with an appropriate adhesive, full coverage, level with its neighbours. Getting it flush is the difference between an invisible repair and an obvious one.

6. Grout to match, and allow it to cure.

Matching the grout

New grout next to old rarely matches, even from the same product, because the existing grout has aged and picked up colour.

For a single tile in an inconspicuous spot it is usually acceptable. In a visible area, the alternative is regrouting the whole surface, which also resolves any other tired grout at the same time.

When to call someone

• The crack runs through multiple tiles in a line. Something is moving and that needs diagnosing first.
• The tile is in a shower floor or a wet area and you are not confident about the membrane underneath.
• The tile is irreplaceable and you cannot afford to break a neighbour.
• Several tiles are drummy around the damaged one, which suggests a bond problem rather than an impact.

That last one matters. If tiles around the damaged one sound hollow, the issue is not the chip. Drummy tiles in a wet area can mean water behind them.

Prevention

Keep offcuts. Genuinely, a box of spares is the difference between a perfect repair and a compromise for the life of the bathroom.

Our tiling services cover repairs and replacements across Sydney, and if the damage turns out to be a symptom of something larger, we will tell you that rather than just replacing the tile.