Licensed and insured, waterproofing across Brisbane since 2010
A leak is never random. Showers fail at the junctions and the waste, balconies at the fall to drain. Why the common failure modes happen, and why the source has to be found before a fix, because the stain is rarely under the leak.
A leak is never random. It is water finding the one weak point in a layer that was supposed to stop it, and that point is almost always a junction, a fall, or a detail that was rushed. Knowing why showers and balconies leak helps you tell a real fix from a coat of hope.
The open floor of a shower rarely fails. The junctions do. The wall-to-floor corners move every time the frame of the house moves, and without a bond breaker the membrane tears right there. Add a single coat that has cracked, or a waste that was not sealed into the membrane, and water gets behind the tiles. From there it travels along the structure and appears as a stain on a ceiling or a wall that can be well clear of it.
A balcony has a harder life. It takes sun, rain and movement, and it depends on a fall to drain that has to carry water off the surface. When the fall is flat, or runs back toward the building, water ponds and sits on the membrane until it finds a join, an upturn or a penetration to get through. Under AS 4654 the fall, the upturns and the drainage are part of the job, not an extra. A perfect coat on a deck that ponds will still leak.
Water always wins a patient fight. The job of waterproofing is to give it no junction, no pond and no penetration to win at. That is detailing, not luck.
The hardest part of a leak is that the stain is rarely under the source. Water tracks sideways along beams and sheeting and shows up where it can drip out. So before we quote a fix, we work out where the water is really getting in, whether that is a shower, a balcony above, a roof penetration or a planter. Fix the cause once and it stops. Seal the symptom and it comes back.
Ask this, exactly
“Before you quote a fix, will you trace where the water is actually getting in, rather than sealing the spot under the stain?”
A leak is found before it is fixed. An operator who quotes a seal without diagnosing the source is guessing with your money.