If your tiles are sound and the problem is only the grout looking tired, stained or cracked on the surface, regrouting is usually the right call. If the tiles are drummy, the waterproofing has failed, or water is getting behind the wall, you are into retile territory. The trick is telling those two situations apart before you spend a dollar.
This guide walks you through a simple decision tree so you can work out which side of the line your job sits on. It sits within our Tile Repairs, Regrouting and Restoration in Adelaide guide.
The core question: cosmetic or structural?
Almost every regrout-or-retile decision comes down to one thing. Is the problem on the surface, or has it gone deeper into the tiles, the adhesive or the waterproofing membrane?
- Cosmetic: discoloured, patchy or lightly cracked grout, mouldy silicone in the corners, a dated colour you want to change. The tiles themselves are firmly stuck and the wall behind is dry. This is a regrouting job.
- Structural: tiles that lift, move or sound hollow when tapped, cracks that run through the tile body, a floor that flexes, or any sign of moisture getting past the membrane. Fresh grout will not fix any of this. This is a repair or retile job.
Regrout solves an appearance problem. Retile solves a failure. Spending regrout money on a structural fault just buys you a nicer-looking wall that keeps leaking.
Step 1: Tap the tiles and check for movement
Before anything else, go around the area and tap each tile with your knuckle or the handle of a screwdriver. A tile bonded properly gives a solid, dull sound. A hollow or drummy ring means the tile has lost its grip on the substrate underneath.
A few drummy tiles can sometimes be repaired individually without a full retile. Our guide on how to fix loose and drummy tiles explains when that works and when it does not. If most of the floor or wall sounds hollow, the whole surface is failing and regrouting is pointless.
Step 2: Check the waterproofing status
This is the step people skip, and it is the most important one in any wet area. Grout is not waterproof. It never was. In a bathroom or laundry the water is held out by a membrane under the tiles, and the grout is just the finish on top.
So if water is getting through, new grout will not stop it. Look for these signs that the membrane, not the grout, is the problem:
- A persistent musty or damp smell that does not clear
- Paint bubbling or staining on the other side of the wet-area wall
- Swollen skirting boards or lifting floorboards in the next room
- Tiles that stay damp or keep growing mould no matter how often you clean
If any of these are present, regrouting is the wrong job. The area needs to come up so the waterproofing can be redone to Australian Standards, which typically costs $500 to $1,500 for a wet area on top of the retile. Grouting over a failed membrane hides the problem until it gets far more expensive.
Step 3: Weigh budget and disruption
Once you know whether the job is cosmetic or structural, the money and the mess usually make the decision for you.
| Factor | Regrout | Retile | |---|---|---| | Typical Adelaide cost | $400 to $900 for a bathroom | $2,500 to $6,500+ for a full bathroom | | Time on site | 1 to 2 days | 1 to 2 weeks with drying and curing | | Bathroom out of action | Usually a day or so | The whole job | | Fixes waterproofing? | No | Yes, done properly | | Best when | Tiles sound, membrane intact | Tiles failing or water getting through |
For a fuller breakdown of what a regrout costs and what is included, see our regrouting cost in Adelaide guide. If you are weighing a repair against a full replacement more broadly, the tile repair vs replacement cost comparison is the one to read.
The decision tree, in short
Run your job through these questions in order and stop at the first one that says retile:
- Do the tiles sound hollow or move? If most of them do, retile. If only a few, look at a targeted repair first.
- Are there signs of water past the membrane? If yes, retile and redo the waterproofing. Do not regrout.
- Are cracks running through the tile body, not just the grout? If yes, those tiles need replacing.
- Is the problem purely how the grout and silicone look? If yes, and everything above checked out, regrout.
If you reach question 4 with a clean run, you are almost certainly a regrouting candidate, and you will save thousands compared with a retile you did not need.
When it is a genuine grey area
Some jobs sit right on the line. A tired ensuite with sound tiles but one soft corner. A kitchen splashback with a couple of drummy tiles and staining everywhere else. In those cases the honest answer is that you need someone to tap the tiles, check the corners and give you a straight read before you decide.
That is where a second opinion pays for itself. A quote for tile and grout regrouting or targeted tile repairs should come with an assessment of whether regrouting is actually the right fix, not just a price for doing it. A tiler chasing the quick regrout job will not tell you the membrane is gone. A good one will.
Get an honest read on your tiles
The cheapest mistake to avoid is regrouting a wall that needed retiling, because you pay twice. Tell us what is going on with your tiles and we will connect you with vetted, licensed Adelaide tilers who will look at the actual condition, tell you whether it is a regrout or a retile, and quote it fairly, free and with no obligation. Get matched with a local tiler and get the real answer before you spend.