Fixing Leaking Balconies the Right Way

Balcony Leak Detection using Thermal Camera

Step 2: Choosing the Right Repair Method

Once the problem is diagnosed correctly, the right fix depends on the severity of the damage.

Option 1: Epoxy Sealing (Only for Minor Leaks)

If the leak is caught early and the waterproofing membrane underneath is still intact, degrouting the surface and applying an epoxy based seal can be the right call. Epoxy performs far better than standard grout or silicone. It’s genuinely waterproof, durable, and resistant to ongoing moisture penetration. It’s also a specialised skill, and not every tiler works with it confidently, so it’s worth confirming experience before committing.

This route is often the first thing homeowners try, because it’s the cheapest and least invasive option, and for the right balcony it holds up well for years. But it comes with a condition: a balcony seal only holds if the waterproofing layer beneath it is still sound. If it isn’t, the leak returns, often within a single wet season. If sealing doesn’t stop the problem, that’s your sign the issue runs deeper than the surface. Our guide on when to rip up or seal balcony tiles breaks this decision down further.

Option 2: Full Tile Removal and Retile

If the balcony is severely compromised, with water already visible in the ceiling below, major cracking, or tiles popping up across the surface, sealing is no longer a realistic option. At this point, a full removal and rebuild is the only fix that actually holds.

This means stripping back to the substrate, correcting drainage falls with proper screeding, repairing or replacing any damaged timber or structure underneath, installing a compliant waterproofing membrane, and retiling on top of it. It’s a bigger job, but it’s the only one that resets the whole system rather than buying time. We’ve documented exactly what this process involves, including what drives the cost, in our detailed breakdown of a complete balcony retile.

Option 3: Tiling Over Existing Tiles

For homeowners looking to save on demolition costs, tiling over the existing tiles may be an option.

How it works:

1. Grinding and priming the existing tiles to create a rough surface for bonding
2. Applying waterproofing over the top to prevent future water ingress
3. Retiling
4. Epoxy grout and sealing

This method is only viable if there’s confidence that there’s no structural damage underneath. If there’s any movement or water trapped below, this approach won’t work, and a full removal will be needed.

What Does It Cost to Fix a Leaking Balcony?

Cost depends heavily on which repair path you’re on. An epoxy reseal on a sound membrane is the cheapest option, a full retile is the most expensive, and tiling over existing tiles sits somewhere in between depending on prep work. The only reliable way to know which category your balcony falls into is a proper on-site assessment, since guessing from the surface is exactly how homeowners end up paying for the wrong fix twice.

Step 3: Avoiding Common Pitfalls

Trap #1: Falling for “quick fix” Solutions

Any repair that doesn’t involve checking waterproofing is a waste of money. Beware of “miracle” products that claim to fix leaks with a spray or paint on coating. If your tiles are loose or water is pooling, sealing won’t help. It just traps moisture underneath, making things worse.

Trap #2: Hiring a General Tiler Instead of a Wet Area Specialist

Not all tilers work with wet areas like balconies and showers. Balconies require additional expertise due to exposure to weather and movement. Choose someone with balcony repair experience, not just someone who lays tiles.

Trap #3: No Warranty, No Licensing, No Accountability

A reputable balcony repair specialist will provide a warranty for their work (we offer a 15-year warranty). Check that they’re QBCC licensed, since this protects you from dodgy workmanship. You can verify a licence yourself through the QBCC’s public licensee register before signing anything. Avoid hiring through platforms where unlicensed handymen often operate.

Understanding the Timeframes and Expertise Required

Balconies are more complex to repair than other tiled areas due to:

• Upstairs location. Hauling equipment, tiles, and materials upstairs adds time and labour.
• Weather exposure. Rain and humidity can delay waterproofing and screeding.
• Irregular shapes and precision cuts. Many balconies have curves or unusual shapes that require expert tiling skills. Most general tilers aren’t trained for this level of precision.
• Niche expertise required. Balconies require a mix of skills, including screeding, waterproofing, and handling drainage correctly.

Few tradies specialise in balcony repairs, which is why it’s hard to find good balcony tilers who aren’t booked out six to twelve months in advance.

If You’re in a Strata Property

If your balcony sits within a strata or body corporate scheme, responsibility for the repair often depends on where the damage originates and what your by-laws say. Our strata balcony repairs guide covers how that process typically works on the Gold Coast. If you’re weighing up whether the repair is covered, it’s also worth checking our guide on balcony leaks and home insurance before you commit to a repair path.