Service
Balcony and terrace waterproofing.
Pedestrian-grade waterproofing for balconies, terraces and podium decks above habitable space — where foot traffic, tiling, UV and a slab full of penetrations all meet, and the membrane has to hold for the life of the build.
A rooftop balcony is a trafficable surface over a building. The membrane beneath it has to hold up to foot traffic, tiling, direct sun, and thermal movement — while a slab full of plumbing, electrical and balustrade penetrations passes through it. When it fails, the water goes down into the slab and the space below.
AS 4654 sets out the requirements for membranes in external above-ground applications, including balconies and podium decks. The work is in the details the standard governs — substrate preparation and correct fall, the membrane system selected for the traffic load and UV exposure, the bond at every drain and penetration, and the detailing at door thresholds and sheet-to-sheet junctions. We install to these requirements, using specified systems from our product partners.
We take on new balcony and terrace waterproofing, and targeted repair of existing installations where the failure is diagnosed and accessible. For active leaks where the source isn't clear, we diagnose first — thermal imaging, moisture mapping, and where useful, flood testing — before specifying a repair.
On site
Underlayment laid, penetrations detailed, fall set.
What we cover
Rooftop balconies
Full membrane systems for new rooftop and podium balconies, installed to AS 4654 for pedestrian traffic and UV.
Terraces and decks
Waterproofing for terraces and decks above habitable space, with correct fall and drainage detailing.
Podium decks
Membrane systems for podium decks and plant decks, rated for the traffic load and exposure.
Door thresholds
Detailing at sliding-door and threshold junctions — a common failure point where the membrane turns up the wall.
Penetration sealing
Detailing and sealing at plumbing, electrical and balustrade penetrations through the slab.
Diagnosis of existing leaks
Non-destructive diagnosis of existing balcony leaks to locate the failure before any repair is specified.
Installed to AS 4654.
The membrane choice for a balcony depends on the traffic load, the tile or finish, the fall, and the UV exposure — made on the specifics of your job, not a default. We use specified systems from ARDEX, Sika, Westox and our other product partners.
If the balcony is already leaking and the source isn't clear, we diagnose before we specify. Repairing the wrong spot costs you money and doesn't stop the leak.
Tell us about the project.
Send a few details and we'll come back within one business day. Active leaks — call us directly.