After Cyclone Alfred swept through the Gold Coast, we’ve had a wave of homeowners calling about leaking balconies, and with good reason. Heavy rain tends to expose weaknesses that have been slowly building up for years: cracked grout, failed membranes, and poor drainage.
If you’re at the point where a regrout and seal is not a viable option and ripping up the tiles is the only solution, you’ll need to start gathering info on a balcony retile.
When gathering quotes and comparing prices, this is when facts get blurry about what that actually involves. Most tilers (and even some builders) won’t explain it properly, they’ll just quote a number and move on.
So, let’s break it down. Here’s exactly what goes into a proper balcony retile, the way we do it at Allspex as balcony leak repair specialists.
1. Balustrade Removal
To do the job right, everything needs to be exposed, including the edges where water loves to sneak in. In many cases, this is where the waterproofing compromise starts – when balustrade contractors screw in the posts and drill right through the membrane.
If the balustrades are sitting directly on the tiles, we need to safely remove the balustrade so we can waterproof and seal around every post and perimeter.
2. Demolition
In most cases, we remove all existing tiles, grout, and bedding to expose the slab beneath. This allows us to check for hidden damage, moisture, or movement before rebuilding.
However, in some cases, we can avoid full demolition. If the existing tiles are solid, well-bonded, and the substrate is sound, we can tile directly over the top instead. In these situations, we skip the jackhammering stage, grind the existing tiles, and apply a bonding primer before laying new ones.
It’s not always possible, but if there’s any sign of water damage to the subfloor or spongy surfaces when stepped on, we’ll need to remove everything, when it is viable, this approach can save around half a day of labour while still delivering a durable, watertight result.
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3. Subfloor Repairs
Once the tiles are up, we can assess the substrate, the surface below. Often, we find cracks, movement, or even rotted timber caused by trapped moisture. We repair or replace anything that’s unstable so the new surface has a solid foundation.
4. Surface Preparation
If there’s one step that makes or breaks a balcony repair, it’s this one, so forgive us, we’re gonna rant a bit here.
We can’t stress this enough: surface preparation is everything.
You could use the best tiles, the best grout, and the most expensive membrane, but if the surface beneath them isn’t prepared properly, the whole system will eventually fail.
Based on what we see when we rip up leaking balconies, we’d say 90% of failures come down to poor prep — yes, we invented this statistic, but this is how it feels based on all the jobs we turn up to with failed balconies.)
Proper prep is what allows every layer after this to bond and perform as it should. Once demolition and repairs are complete, we mechanically grind the concrete surface to remove old residues, glue, and contaminants. This gives the waterproofing membrane a smooth, clean surface to grip onto.
Next, we apply a compatible primer that creates a chemical bond between the concrete and the waterproofing membrane. This ensures the membrane adheres evenly and doesn’t blister, peel, or trap moisture, issues we see constantly in failed balconies.
It’s a meticulous job, but it’s the difference between a repair that lasts two years and one that lasts fifteen.
At Allspex, we don’t cut corners here, ever. This is where most tradies go wrong, and it’s exactly why we’re called in to fix other people’s mistakes.
5. Waterproofing
Once the surface is properly ground and primed, we move on to waterproofing, something that not even some tradies understand.
We apply two full coats of premium waterproof membrane, allowing the first coat to cure completely before applying the second. It’s not just overkill, it’s necessary. Even the best waterproofers can end up with tiny pinholes in their first coat. These are small gaps or bubbles that can let water through over time if not sealed properly.
The second coat fills in any of those pinholes and builds up the required film thickness for a truly watertight barrier. Corners, edges, and penetrations (like balustrade posts or drains) are reinforced with bond-breaker bandages and extra detail work to prevent weak spots.
6. Screeding
This is one of the most important (and most overlooked) steps. The screed is what creates the slope, or “fall”, that directs water off your balcony instead of letting it sit and soak in.
We rebuild the screed using a proper cement-based compound, ensuring correct drainage and a level, stable base for tiling. It’s a job everyone absolutely hates to do, so they do it badly; some even avoid it by building up the slope just with tile glue. Poor screeding is the main reason why water pools on a balcony, and if water is left sitting on tiles, it will seep through the grout and….you know what happens down the line.
To take this step even further, our director, Marco, developed our own proprietary waterproof screed, called HydroLock ProBlend™. By blending a specialised additive into the mix, even our screed itself becomes waterproof, an extra layer of protection you won’t find anywhere else.
7. Tiling
This is where precision and craftsmanship come in. We lay tiles using a high-quality outdoor adhesive suited to the Gold Coast’s weather conditions. Every tile is levelled, and the pattern and drainage direction are carefully planned. You might think that any DIYer can slap on some glue and lay down a tile, but ask our clients – you can tell the difference when it’s done properly, it’s clean, consistent, and beautiful.
8. Epoxy Grout & Seal
Instead of using traditional cement grout, we finish with our FlexiShield™ epoxy system, a completely waterproof, resin-based product that won’t crack or absorb moisture. It locks out water, resists mould, and gives a strong, flexible seal that holds up under movement and weather. Added bonus – it’s much easier to keep clean because it’s not as porous as cement grout.
9. Balustrade Refit
Finally, we reinstall and seal the balustrade posts, making sure every fixing is watertight. Unlike most tilers, we handle this part ourselves if we can, so you don’t need to coordinate extra trades.
Now You Know Where Your Money Goes
By now, you can probably see that a proper balcony retile isn’t “just another tiling job.”
It’s a major project, one that combines multiple trades, careful coordination, specialist tools, and a serious amount of skill. It’s hot, physical work under tough Gold Coast conditions, and there’s a lot of risk involved if it’s not done right.
So yes, it’s a big job, and it costs. It takes time, planning, and the right people. But this is your outdoor space we’re talking about, the place you’ll enjoy coffee in the mornings, barbecues with friends, or sunsets after a long week. You want it to last.
At Allspex, we don’t take shortcuts. We do the hard yards so you can enjoy your balcony for years to come, watertight, beautiful, and built to last with a warranty that we honour.
If you’re not sure which you need, stay tuned, a future post will explain when to regrout and seal vs when to retile.
