Waterproofing, Sydney.

Waterproofing remediation is the process of stopping water getting into places it should not, then repairing the damage it has already caused. It covers diagnosing the source of a leak, removing and replacing the failed waterproof membrane, correcting the falls and drainage that let water pool, and reinstating the tiling and finishes over the top. The aim is a properly sealed, correctly draining surface that performs the way it was meant to, not a quick patch that leaks again next season.

Common triggers include water staining or damp patches on ceilings and walls below wet areas, bubbling or lifting paint, efflorescence (white salt deposits), and tiles that sound hollow or lift underfoot. Pooling water on a balcony or podium after rain, a persistent musty smell, or leaks appearing in the unit or level below are all signs the membrane or drainage has failed. If any of these show up, the water is usually travelling further than it looks, so early diagnosis limits the damage.

We carry out balcony, bathroom, podium, planter box, basement and roof waterproofing remediation. That spans the wet areas inside a building and the exposed decks, terraces and landscaped areas outside it, as well as below-ground basements and roof-level waterproofing. Balcony waterproofing in Sydney is one of the most frequent jobs we handle for strata and commercial buildings, where a single failed deck can affect several units below.

Water rarely enters where it appears, so we start with proper leak diagnosis to trace the ingress back to its true source. That means reading how the water is tracking through the structure rather than assuming the stain marks the failure point. Getting the source right is what separates a lasting repair from a recurring problem, which is why we invest the time up front before any membrane comes off.

We begin with diagnosis to confirm the real source of the ingress, then set out a scope that addresses the cause. The failed membrane is removed and replaced, the falls and drainage are corrected so water runs to where it should, and the tiling and finishes are reinstated to complete the area. Throughout, our focus stays on fixing the cause, not just the symptom, so the same leak does not return once the surface is closed up.

Yes. Projex Pro holds NSW company builder licence 378139C and is a registered Design and Building Practitioner (DBP BUP0001044). Waterproofing sits within the class of building work that NSW regulates closely, so choosing a licensed remedial and construction builder for waterproofing in Sydney gives owners corporations and commercial owners the assurance the job is documented and carried out in line with NSW requirements.

Our waterproofing and leak repair work is aimed squarely at strata schemes, owners corporations and commercial building owners. We understand the practicalities of working across occupied units, shared podiums and common property, and we keep strata managers informed so decisions can be taken to the committee with confidence. This is remedial and construction work planned around a live building, not domestic building work.

We are based in Neutral Bay and work across Sydney, including North Ryde and Ryde, the Northern Beaches, the North Shore, the Inner West, the Eastern Suburbs and the CBD. If your building sits within these areas and has a waterproofing or leak issue, you can reach the team on 1800 93 94 95 to arrange a diagnosis.