A cracked tiles repair only works if you fix the cause first. Replace the tile and leave the problem underneath, and the new tile cracks in the same place within a year.
Tiles almost never fail on their own. They fail because something under or around them moved, or because they were never properly bonded. Here is how to tell which, and what each one costs to put right.
The four things that actually crack tiles
Nearly every failure traces back to one of four causes. Working out which one you have is the whole job.
- Movement – the slab, screed or building shifted and the tile could not
- Poor adhesive coverage – the tile was never fully bonded and eventually gave way
- Substrate failure – a cracking screed, damp, or a flexing timber floor
- Impact – something heavy landed on it, usually over a hollow spot
Impact is the only one that is genuinely a one-off. The other three will keep happening until they are addressed.
How to read the pattern
The way the damage is spread tells you more than the crack itself.
- One isolated cracked tile: usually impact, or one poorly bedded tile
- A straight line of cracks across several tiles: a crack in the slab or screed below
- Cracks along a wall junction or doorway: a missing movement joint
- Tiles lifting or tenting up in the middle of a room: compression, no expansion allowance
- Scattered hollow tiles: poor adhesive coverage across the whole installation
The tap test: finding drummy tiles
Tap across the floor with a coin or the handle of a screwdriver. A well-bonded tile sounds solid and dull. A hollow, drummy ring means there is a void under it.
Drummy tiles are the early warning. They are not cracked yet, but they have nothing supporting them, so the next dropped pan or heavy chair leg breaks them.
- One or two drummy tiles: a local bedding problem, replaceable
- A whole area ringing hollow: the installation is failing across the board
- Drummy plus cracking in a line: look at the substrate, not the tiles
Map the drummy areas with masking tape before anyone quotes. It turns a vague complaint into a measured area and gets you a far more accurate price.
Movement joints and why they get left out
A tiled floor expands and contracts with temperature and moisture. It needs somewhere to do that. Movement joints – flexible silicone-filled gaps – are meant to be built in at wall perimeters, doorways and across large areas.
They get left out constantly because they are fiddly and a solid grout line looks tidier. Then the floor grows, has nowhere to go, and pushes tiles up off the screed in a ridge.
If your tiles have tented in the middle of a room, this is almost always why, and simply relaying that strip without adding a joint will not hold.
Damp and substrate problems
Water is the quiet cause. Rising damp, a slow leak behind a wall or a failed shower waterproofing system will break the adhesive bond over time and push tiles off. Tile and adhesive standards are published by the South African Bureau of Standards.
Signs to look for are staining around the failing area, a musty smell, salt deposits at floor level, or grout that stays dark long after the floor has dried. If damp is involved, tiling is the last job, not the first – the water has to be dealt with through waterproofing before anything is re-laid.
Repair or re-lay: making the call
This is the decision that saves or wastes money.
A local repair makes sense when:
- Only a few tiles are affected and the rest sound solid
- You have matching spare tiles, or can still buy them
- The cause is identified and fixable in that area
- The substrate underneath is sound
Re-laying makes sense when:
- Large areas sound hollow when tapped
- Cracks run in lines across the floor
- The screed itself is cracked or breaking up
- The tile is discontinued and no match exists
- You have already patched the same area more than once
Matching is the practical killer. Tiles change shade between production batches, and a discontinued range means a repair that always looks like a repair. That alone often tips a job towards re-laying a whole room.
What cracked tiles repair costs in 2026
- Tile repair work: roughly R150 to R450 per m2
- Single cracked tile replacement: around R300 to R800, driven by the call-out minimum
- Several minor repairs: commonly R300 to R1,500
- Full removal before re-tiling: R50 to R100 per m2, more for stubborn adhesive
- Screed repair or levelling: quoted on inspection
Small jobs feel expensive per tile because a minimum charge applies. Travel, setup and dust protection cost the same whether it is one tile or ten, so batching repairs together is far better value.
Why DIY repairs usually fail
Lifting one tile without cracking its neighbours takes patience and the right tools. Most DIY attempts either damage adjoining tiles or leave old adhesive ridges that stop the new tile sitting flush, which creates a step you feel with every step.
Filler and touch-up kits hide a hairline crack cosmetically, but they do nothing about the void or the movement underneath. The crack comes back.
Getting cracked tiles sorted properly
Before anyone quotes, do three things: tap the floor and mark the hollow areas, photograph the crack pattern, and check whether you have spare tiles. Those three pieces of information change the price and the recommendation.
Then ask any contractor what they think caused it. If the answer is only “the tile broke”, get a second opinion. If you are considering a fresh surface anyway, our flooring installation Cape Town guide covers the alternatives and sequencing.
We diagnose and repair tile failures across Cape Town through our flooring and tiling service, including screed repair and waterproofing where damp is the real cause. Assessments are free with no call-out fee – send us photos of the cracked area and we will tell you honestly whether it needs a repair or a re-lay.
Cracked tiles repair: the short version
If you take one thing from this guide on cracked tiles repair, make it this: get the scope written down before anyone starts. Most disputes about cracked tiles repair come from an unclear brief, not bad work.
We quote cracked tiles repair properly, in writing, after seeing the job. Assessment is free and there is no call-out fee on quoted work.
Frequently asked questions
Why do floor tiles crack for no reason?
There is always a reason, it is just usually underneath. The common causes are movement in the slab or screed, poor adhesive coverage leaving the tile unsupported, substrate failure from damp or a flexing floor, and missing movement joints. A crack running in a straight line across several tiles almost always means the screed below has cracked.
What does it mean when tiles sound hollow?
It means there is a void under the tile because the adhesive never bonded properly across the full back. These are called drummy tiles. They are not cracked yet, but with nothing supporting them the next impact breaks them. One or two are a local problem; a whole area ringing hollow means the installation is failing.
How do you fix a cracked tile without replacing it?
Colour-matched filler or a repair kit can hide a hairline crack cosmetically, and that is genuinely useful on a discontinued tile you cannot match. It does nothing about the void or the movement that caused the crack, so it is a cosmetic delay rather than a repair. The crack usually reappears in the same place.
How much does it cost to repair cracked tiles?
Tile repair work generally runs R150 to R450 per square metre, with a single cracked tile replacement costing around R300 to R800 because a call-out minimum applies. Several small repairs together commonly total R300 to R1,500. Batching repairs into one visit is much better value than calling someone out per tile.
Should I repair tiles or relay the whole floor?
Repair if only a few tiles are affected, the rest sound solid when tapped, and you can match the tile. Re-lay if large areas ring hollow, cracks run in lines, the screed itself is failing, or the tile is discontinued. Matching is often the deciding factor, since shade varies between production batches.