Balconies are constantly exposed to sun, rain, and temperature changes—which means wear and tear is inevitable. But when that exposure starts causing water leaks or structural issues, it’s often a sign that your balcony’s waterproofing system is failing.
Here are the top five signs your balcony needs resealing, and why you shouldn’t wait to act.
1. 💧 Water Pooling or Slow Drainage
If water isn’t draining properly from your balcony and instead forms puddles or lingers after rain, it’s a red flag. Standing water can slowly penetrate joints and grout lines, leading to leaks and internal damage.
What to look for:
- Water pooling in low spots
- Drainage issues even after light rainfall
- Dampness that lasts for hours or days
2. 🧱 Cracked, Loose, or Missing Grout
Grout is your balcony’s first line of defence against moisture—but it doesn’t last forever. Over time, grout can crack, shrink, or crumble away, leaving gaps that let water in.
Why it matters:
Damaged grout allows water to seep behind tiles and into the slab beneath. This is one of the most common causes of balcony leaks and structural weakening.
3. 🦠 Mould, Mildew, or Efflorescence
Discolouration on your balcony surface—especially in the form of white powder (efflorescence), black mould, or green mildew—usually indicates water intrusion.
These signs suggest:
- Water is penetrating the surface
- The current waterproofing layer has failed
- You may already have internal moisture issues
4. 🧱 Hairline Cracks in Tiles or Substrate
Small cracks in tiles or the balcony screed may seem harmless, but they’re often early signs of movement or moisture damage. Water entering through these cracks can spread quickly and weaken the structure over time.
Warning signs:
- Cracks following tile grout lines
- Minor tile lifting or uneven surfaces
- Soft or hollow sounds when tiles are tapped
5. 🛠️ Water Damage on Walls or Ceilings Below
One of the most serious indicators your balcony needs resealing is visible damage inside your home. If your balcony is above a living space or garage, look for:
- Bubbling paint
- Damp patches or stains
- Warped skirting boards or sagging plaster
This confirms water is leaking through the balcony floor and into the building.
💡 Don’t Wait for the Damage to Worsen
When you spot any of the above signs, it’s time to act. Balcony resealing is a fast, non-invasive way to stop further damage without the cost of full renovations.
At Leaking Showers Sealed, we specialise in fixing leaking balconies using waterproof membranes, epoxy grout, and advanced sealing systems—no tile removal needed.
📞 Need Balcony Resealing in Sydney?
Whether you're dealing with visible leaks or just want peace of mind, we’ll inspect, reseal, and protect your balcony for years to come.
👉 Explore our balcony resealing service or book a free quote today.