Certified membranes, honest advice and a written 7-year warranty. We waterproof balconys, bathrooms and basements across Kogarah and nearby suburbs.
Kogarah NSW 2217
Looking for a professional waterproofing service in Kogarah? AB Sydney Waterproofing are experts in providing reliable residential, strata and commercial waterproofing across Kogarah NSW 2217. As licensed waterproofers in Kogarah, we find the real cause of every leak and fix it with long-lasting membranes – backed by a free inspection and a written 7-year warranty.
From apartments and units near the station to brick family homes, the properties we waterproof in Kogarah and across the St George area vary a lot. What doesn’t change is our approach: inspect carefully, find the cause, and use a membrane system that suits the surface, the exposure and how the space is used.
Our process is simple: a free inspection, a clear written quote, proper surface preparation, the right membrane applied at full thickness, and testing and certification at the end. No shortcuts, and no paying twice for the same leak.
Every waterproofing service is available in Kogarah. Balcony, Bathroom, Basement and Rooftop waterproofing get our closest attention, because they’re the jobs Kogarah property owners call us for most.
Balconies
Water should run off a balcony, not sit on it. We check falls, outlets and thresholds first, fix any ponding, then apply a flexible external membrane with reinforced corners and properly sealed upstands – so your Kogarah balcony drains properly and stays sealed.
Bathrooms
A failed shower membrane lets water into the floor, wall frames and the room or unit below – often for months before you see a stain. We repair leaking showers and waterproof new and renovated bathrooms in Kogarah to AS 3740, sealing floor wastes, corners and wall junctions properly.
Retaining walls
Water pressure behind a wall never stops, so below-ground waterproofing has to be continuous – walls, slab and the joint between them. We seal construction joints and penetrations, then apply a membrane designed for constant moisture.
Flat roofs
Flat concrete roofs and roof decks pond water after storms, and ageing membranes crack under UV and heat. We re-membrane roofs in Kogarah with systems designed for full sun exposure and ponding, keeping the floor below dry.
Long box gutters overflow inside when their lining fails. We seal gutters and outlets to keep water on the outside.
Lift pits and shafts sealed against groundwater to protect lift equipment and stop corrosion in apartment and commercial buildings.
A properly sealed laundry floor and upturn protects floors, walls and neighbouring rooms from washing machine and tub leaks.
Concrete and screed floors waterproofed for wet areas, ground floors and commercial spaces where water must stay out of the slab.
Epoxy resin injected under existing tiles seals a leaking shower without demolition – a faster, lower-cost fix when the tiles are still sound.
Planter boxes and podium gardens lined with root-resistant membranes and proper drainage so they don't leak into walls or car parks.
Brick walls, parapets and chimneys sealed against rising and penetrating damp to stop salt damage, flaking render and mould inside.
Concrete pools and spas waterproofed so the shell holds water and the paving and ground around it stay dry.
Our inspection finds the real source of a leak first, so you only pay to fix what's actually failing.
We hold Waterproofing Licence 36763C and put our name to every membrane we install – no unlicensed subcontractors.
Our free quote spells out the problem, the solution and the cost, so you can decide with all the facts.
Every job in Kogarah is backed by a written 7-year warranty. If something isn’t right, we come back and fix it.
We test and trace the leak first, so the quote covers what’s actually failing – not guesswork.
We follow AS 3740 inside and AS 4654 outside, and hand over the paperwork your certifier, insurer or buyer will ask for.
From a single bathroom to a full apartment block or commercial roof, we plan work around residents, tenants and business hours.
These are the early warning signs that waterproofing has failed. Catch them early and the repair is usually smaller.
A bathroom, balcony or roof above is leaking through the slab.
Efflorescence means water is moving through the masonry.
The bond has failed because the bed underneath is wet.
Water is sitting behind tiles or inside the wall cavity.
Groundwater is getting past below-ground walls or joints.
Water is passing through the wall instead of draining behind it.
How every waterproofing job in Kogarah runs, from first call to final certificate.
We visit your Kogarah property and trace the leak to its source.
A written, itemised quote with no obligation.
Proper preparation first – cracks repaired, corners and joints reinforced – then the membrane goes on.
We test, hand over the compliance certificate and register your 7-year warranty.
Our licensed waterproofers service all of Kogarah and the wider St George area. Wherever you are in the suburb, we can inspect, quote and complete the job with minimal disruption.
AB Sydney Waterproofing 24 Copeland St, Liverpool NSW 2170 0449 725 455 avo.bghdoean@gmail.com
Yes. We waterproof apartments and units near the station to brick family homes throughout Kogarah NSW 2217 and the surrounding St George area. Call 0449 725 455 to book a free inspection.
Most balcony leaks start at the door sill, the drain or the balustrade fixings, where the membrane has cracked or was never properly detailed. We find the failure point and re-waterproof the balcony properly.
Yes. We apply a certified membrane to AS 3740 before tiling and provide a compliance certificate for your records, your builder and any future sale.
Yes. All work is carried out under Waterproofing Licence 36763C, and we’re happy to show it on site. A licensed waterproofer matters for insurance claims, strata approvals and selling your property.
Most shower and balcony repairs take a few days including curing time; tile injection is usually done in a day. Larger roofs, basements and strata jobs are scheduled in stages – we’ll give you a timeframe with your quote.
Why balconies fail at the door sill, drain and balustrade, and how the right membrane stops it.
Read MoreStains, smells and loose tiles – what they mean and when to call a waterproofer.
Read MoreLiquid, sheet or injection – which system suits which job.
Read MoreTalk to a licensed waterproofer today – free inspection and written quote.
