Shower regrouting is the process of removing old, cracked or crumbling grout from between your tiles and replacing it with fresh grout. It restores the look of a tired shower and helps keep water where it belongs — but here’s the part most people don’t realise: regrouting on its own often won’t stop a shower from leaking. This guide explains what regrouting involves, what it costs, when you actually need it, and when it’s the wrong fix for the problem.

If your shower is leaking or growing mould, book an inspection before you spend money on regrouting — we’ll tell you whether new grout will solve it or whether you need a reseal.

What is shower regrouting?

Grout is the hard, cement-based filler in the lines between your tiles. It holds the tiles in position and helps resist water at the surface. Over the years, grout takes a beating: it’s porous, it absorbs moisture, and the constant movement of a building slowly works it loose. Eventually it cracks, stains, goes patchy, or falls out altogether.

Regrouting fixes that. The old, failed grout is raked or cut out of the joints, the lines are cleaned, and fresh grout is applied and finished off. Done well, it leaves the shower looking sharp and the tile joints solid again.

It’s important not to confuse regrouting with resealing. Grout fills the gaps between tiles; silicone seals the flexible joints — the corners, the base, around the screen. A shower usually needs attention to both, and the two jobs are often done together.

Signs your shower needs regrouting

You can usually spot tired grout without any tools:

• Cracked or crumbling grout lines, especially in the corners and along the floor.
• Missing grout where the joints have washed or fallen out.
• Discoloured, stained or permanently dark grout that won’t clean up.
• Grout that feels soft or powdery when you press it.
• Loose tiles that move or sound hollow when tapped — a sign water has been getting behind them.

If you’re also seeing recurring mould or water marks outside the shower, the grout is likely only part of the story — see can missing grout cause leaks for what’s really going on.

How much does shower regrouting cost?

Regrouting is one of the more affordable shower repairs — far cheaper than retiling or renovating. The price depends on a few things:

• The size of the shower and how many metres of grout line need doing.
• How much old grout has to be removed — a full strip-out takes longer than a touch-up.
• The condition of the tiles and how easily the old grout comes out.
• Whether resealing or other repairs are needed at the same time (most showers benefit from both).

The honest advice: get the regrouting done as part of a proper assessment rather than as a stand-alone patch job. If the shower is leaking, regrouting alone is money spent on a symptom — and you’ll be paying again when the real problem resurfaces. (Our guide to the cost of leaking shower repairs puts regrouting in context against the bigger repairs.)

Will regrouting stop my shower leaking?

This is the question that saves people the most money, so we’ll be straight about it: usually not on its own.

Grout is not waterproof. It’s water-resistant at best, and it’s porous — water can pass straight through it over time. The thing actually keeping water inside your shower is the waterproof membrane hidden behind the tiles, backed up by sound silicone at the flexible joints. If your shower is leaking, the problem is almost always a failed seal or failed waterproofing — not just the grout.

So while fresh grout looks great and helps, regrouting a leaking shower without addressing the silicone and waterproofing is like repainting a wall with a hole in it. The leak keeps going behind the scenes. That’s why we always inspect first.

Regrouting vs resealing vs rebuilding

Here’s how the three options compare, and when each is the right call:

Regrouting is right when the grout has simply worn out but the shower is otherwise sound and not leaking — a cosmetic and maintenance refresh.

Resealing is the fix for a leaking shower where the tiles and waterproofing are still good. It removes failed silicone and grout, treats mould, and re-seals the shower watertight — usually with no tiles removed. This is the most common solution we provide, and it’s covered in our shower resealing guide. Most leaking showers need a reseal, not just a regrout.

Rebuilding is needed when the waterproofing membrane has failed or there’s structural water damage behind the tiles. At that point the shower has to be stripped back and re-waterproofed to current Australian Standards — see our shower rebuilds service.

You can’t always tell which one you need from the bathroom floor, which is exactly why an inspection beats guessing.

Can you regrout a shower yourself?

You can, and for purely cosmetic touch-ups it’s a reasonable weekend job. If you want to try it, the basic steps are:

1. Rake out the old grout with a grout removal tool, getting right down into the joints without chipping the tiles.
2. Clean the lines thoroughly and let them dry.
3. Mix the new grout to the right consistency and work it firmly into the joints.
4. Wipe back the excess with a damp sponge before it sets.
5. Let it cure, then seal the grout if recommended for your type.

The risks to be aware of:

• It’s slow and fiddly, and it’s easy to chip tiles when removing old grout.
• New grout won’t fix a leak — if water is getting behind the tiles, you’ll be regrouting the same shower again before long.
• You can seal in mould if the joints aren’t clean and dry.
• Silicone joints still need doing separately, and the corners are where most leaks actually start.

If the shower is leaking, DIY regrouting often makes the problem harder to diagnose later, because the surface looks fine while water keeps moving behind the wall.

Why does grout keep failing?

If your grout has cracked or fallen out more than once, the grout usually isn’t the real culprit — it’s a symptom. Two things are normally behind it:

• Movement. Buildings flex and shift, and so does a shower floor underfoot. Rigid grout can’t absorb that movement, so it cracks. The flexible joints (corners and base) should be sealed with silicone, not grout — using grout there is a common reason it keeps failing.
• Water behind the tiles. If the waterproofing has failed, the area behind your tiles stays damp. That constant moisture, plus the freeze-thaw of daily temperature swings, breaks grout down from behind no matter how often you replace it.

Fix the cause and the grout stays put. Keep replacing grout without fixing the cause and you’ll be doing it every year.

Shower regrouting in Brisbane and the Gold Coast

Our climate is tough on grout. Brisbane and Gold Coast humidity keeps showers damp for longer, and through the wet season grout barely gets a chance to dry out — which speeds up staining, mould and breakdown. Older homes and showers that have already been “touched up” a few times are often well past a simple regrout. If you’re local and your grout keeps failing, it’s worth having the seal and waterproofing checked before you spend on grout again.

Get it assessed before you regrout

Fresh grout makes a shower look good, but it’s only the right fix if the shower isn’t leaking. Spend a little on a proper inspection first and you’ll avoid spending a lot on a job that doesn’t last.

Book a regrout and reseal assessment with Leaky Showers and we’ll tell you exactly what your shower needs — whether that’s a simple regrout, a full reseal, or something more.

Frequently asked questions

How much does it cost to regrout a shower? Regrouting is one of the cheaper shower repairs — usually well under the cost of retiling. The price depends on the shower’s size, how much old grout needs removing, and whether resealing is needed at the same time. An inspection gives you a firm quote and confirms regrouting is the right fix.

Will regrouting stop my shower from leaking? Usually not on its own. Grout is porous and isn’t what keeps water in your shower — the waterproof membrane and silicone seals do. If the shower is leaking, it almost always needs resealing or a rebuild, not just new grout.

What’s the difference between regrouting and resealing? Regrouting replaces the hard grout between the tiles. Resealing replaces the flexible silicone at the joints (and usually includes grout work) to make the shower watertight. Leaking showers need resealing; regrouting is mainly cosmetic and maintenance.

How often should a shower be regrouted? It varies with use and climate, but grout typically needs attention every several years. In humid areas like Brisbane and the Gold Coast it can break down faster, so it’s worth checking annually.

Can I regrout a shower myself? Yes, for a cosmetic refresh. Be aware it’s slow work, it’s easy to chip tiles, and new grout won’t fix a leak or seal the corners — those need silicone. If the shower leaks, DIY regrouting can hide the real problem.

Why does my shower grout keep cracking? Cracking grout is usually caused by building movement or water sitting behind the tiles. Grout is rigid and can’t flex, so it cracks at movement points (which should be sealed with silicone instead), and failed waterproofing keeps the area damp, breaking grout down from behind.

Shower resealing is the process of removing old, failed silicone and grout, treating the affected areas, and re-sealing your shower so it’s watertight again — usually without removing a single tile. It’s the most common fix for a leaking or mouldy shower, and it costs a fraction of a full bathroom renovation. This guide covers what’s actually involved, what you can expect to pay, the signs your shower needs it, and how to decide between resealing and a rebuild.

If your shower is leaking, growing mould that won’t quit, or just feels like it’s getting tired, book a resealing inspection — we’ll tell you straight whether a reseal will fix it or whether something more is going on.

What is shower resealing?

Over time, the silicone and grout that keep your shower watertight break down. Silicone shrinks, cracks and peels away from the tiles; grout becomes porous, crumbles and lets water track behind the wall. Once that happens, water escapes the shower a little more every day — feeding mould, rotting timber, and eventually showing up as a stain on the ceiling or wall.

Resealing reverses that. A professional reseal strips out the old, perished sealant, cleans and prepares the joints, treats any mould, and re-seals the shower with fresh, high-grade materials so it holds water the way it’s meant to. The big advantage over a renovation is that your tiles stay where they are — there’s no demolition, no dust everywhere, and no waiting weeks for trades.

If you want the plain-English version of what the term covers, our explainer on what resealing your shower really means breaks it down further.

Signs your shower needs resealing

You don’t need to wait for a flooded ceiling to act. The earlier you reseal, the less damage there is to deal with. Watch for:

• Cracked, peeling or mouldy silicone around the base, corners and screen.
• Grout that’s missing, crumbling, or has gone dark in the joints.
• Black mould that keeps coming back no matter how often you clean it — a classic sign water is sitting behind the surface. (We cover this in detail in our guide to black mould in the shower.)
• A musty smell that won’t shift.
• Water stains on the ceiling below the shower, or on the wall just outside it.
• Loose or “drummy” tiles that sound hollow when tapped.

Any one of these is worth a look. Several together usually means water is already escaping — see our 9 warning signs of a leaking shower seal for the full checklist.

How does the resealing process work?

A professional reseal is methodical, and it’s what makes the difference between a fix that lasts and one that fails again in six months:

1. Inspection. We assess the shower to confirm a reseal will actually solve the problem — and that the waterproofing underneath is still sound.
2. Removing the old seal. All the perished silicone and any failed grout is cut out and removed completely. Skipping this step is why DIY jobs fail.
3. Cleaning and mould treatment. The joints are cleaned out and any mould is treated, so it isn’t sealed in.
4. Drying. The area is dried thoroughly — sealing over damp joints is a recipe for trapped moisture and more mould.
5. Re-grouting and re-sealing. Fresh grout and professional-grade silicone go in, applied in neat, continuous beads at the joints and movement points.
6. Curing. The sealant is left to cure before the shower goes back into use.

The result is a watertight shower, done in a day for most jobs, with no tiles touched.

How much does shower resealing cost?

Most homeowners want a number, so here’s an honest answer: shower resealing typically costs far less than retiling or rebuilding a bathroom — usually a few hundred dollars for a standard reseal, with the final price depending on the job. The main things that affect cost are:

• The size of the shower and how many joints need sealing.
• The condition — heavy mould, failed grout or multiple problem areas take longer.
• Whether grout work is needed as well as silicone.
• Access and tile type — some finishes need more careful handling.

It’s worth comparing that to the alternative. Letting a leak run can mean replacing rotten wall framing, water-damaged plasterboard and flooring — a repair that runs into the thousands. A reseal done early is one of the cheapest ways to protect your home. (We go deeper on pricing in our guide to the cost of leaking shower repairs.)

Be wary of quotes that seem too cheap — if the old silicone isn’t fully removed and the area isn’t dried properly, you’ll be paying again within a year.

Resealing vs rebuilding: which one do you need?

This is the question that decides everything, and it comes down to whether your waterproofing membrane is still doing its job.

Resealing is the answer when the tiles and the waterproof membrane behind them are still sound, and the problem is limited to perished silicone and grout. This covers the large majority of leaking showers — it’s quick, affordable, and non-invasive.

A rebuild is needed when the waterproofing has failed, the substrate is rotten, or the shower has been leaking long enough to cause structural damage. In that case, no amount of resealing will hold, because the water is getting past a layer you can’t reach. The shower has to be stripped back and re-waterproofed to current Australian Standards. Our shower rebuilds service handles this.

You can’t always tell which camp you’re in from the bathroom floor — that’s exactly what an inspection is for. The good news is that most showers we look at only need a reseal.

DIY resealing vs hiring a professional

You can buy a tube of silicone and have a go yourself, and for a tidy cosmetic touch-up that’s fine. But there are good reasons most resealing jobs end up being done professionally:

• Removing the old seal properly is the hard part. New silicone won’t bond to old silicone or a dirty joint — it just peels away. Full removal is fiddly and time-consuming.
• Sealer choice matters. The right shower sealer and sealant for a wet area aren’t the same as a general-purpose tube from the hardware shop. The wrong product fails fast.
• Trapped moisture causes mould. Sealing over a joint that isn’t fully dry traps water in — and the mould comes straight back.
• Warranty. A professional reseal comes with a workmanship warranty; a DIY job comes with crossed fingers.

If your shower is actively leaking, a DIY reseal also risks hiding the problem rather than fixing it — water keeps moving behind the wall while the surface looks fine.

How long does a shower reseal last?

A properly done professional reseal will typically keep a shower watertight for several years — and many come with a workmanship warranty for peace of mind. You can extend its life with simple habits: run the exhaust fan, squeegee the walls and screen after showering, keep the bathroom ventilated, and check the silicone and grout once or twice a year so you catch small cracks before they become leaks.

Shower resealing in Brisbane and the Gold Coast

Our climate is hard on showers. Brisbane and Gold Coast summers are warm and humid, and through the wet season bathrooms can stay damp for days — which speeds up how quickly silicone and grout break down and how fast mould takes hold. Older Queenslanders and two-storey homes are especially worth keeping an eye on, because a slow shower leak upstairs can quietly damage the ceiling below. If you’re local and searching for “shower resealing near me”, we service Brisbane, the Gold Coast and Logan, and we’ll come and assess it properly.

Get your shower resealed before it costs you more

A leaking shower never fixes itself, and it only gets more expensive the longer it’s left. Resealing is the fast, affordable way to stop the water at its source — no demolition, no renovation, no guesswork.

Book a shower resealing inspection with Leaky Showers and we’ll tell you exactly what your shower needs.

Frequently asked questions

How much does it cost to reseal a shower? Shower resealing usually costs far less than retiling or renovating — typically a few hundred dollars for a standard shower, depending on its size, condition and whether grout work is needed. An inspection gives you a fixed quote. Compared with repairing the water damage a leak can cause, it’s one of the cheapest ways to protect your home.

How long does shower resealing take? Most standard resealing jobs are completed in a single day, including removing the old seal, treating mould, and applying fresh grout and silicone. The shower then needs time for the sealant to cure before use.

Is resealing the same as regrouting? Not quite. Regrouting replaces the grout in the tile joints; resealing focuses on the silicone seals (and often includes grout work too). Many showers need both. The right combination depends on what’s failed.

Will resealing fix my leaking shower? In most cases, yes — if the leak is caused by perished silicone or failed grout and the waterproofing membrane behind the tiles is still intact. If the membrane has failed, the shower will need a rebuild instead. An inspection confirms which one you need.

Can I reseal my shower myself? You can attempt a cosmetic touch-up, but the parts that make a reseal last — fully removing the old silicone, drying the joints, treating mould and using the correct wet-area sealer — are easy to get wrong. A professional reseal also comes with a warranty.

How often should a shower be resealed? It varies with use and climate, but most showers benefit from resealing every several years. In humid areas like Brisbane and the Gold Coast, silicone and grout can break down faster, so it’s worth checking yours annually.

How long does a reseal last? A professional reseal typically lasts several years and often comes with a workmanship warranty. Good ventilation and regular drying will extend its life.