Keelson WaterproofingMelbourne remedial waterproofing & leak injection
Call 0449 997 094

Leaking basement, carpark or lift pit?

We stop water at the crack or construction joint by resin injection — working from inside, with no excavation and no damage to finished works. You get a written diagnosis, a method statement and a fixed price you can forward the same day.

Book a site assessment Call 0449 997 094
20+ years on site Below-ground waterproofing specialist $20M public liability Ex-Tier 1 builder defects & warranty
Water tracking down every panel joint along a basement carpark wall, with standing water across the floor
Melbourne basement carpark — active water ingress at the panel joints, water pooling across the bays. This is the point where it goes on the defect list.

What we actually do

Negative-side injection. The resin goes into the crack, reacts with the water and seals the path it is travelling through — from the dry side, where the leak shows.

Diagnose it

We find where the water is really entering, which is rarely where it appears. You get it in writing.

Inject it

Packers into the crack or joint, resin under pressure, sealed through the full wall thickness.

Document it

Method statement, fixed price scope and a close-out pack a superintendent will sign off.

Injection packers installed in a row along the wall-to-floor construction joint of a basement carpark
Packers set along the wall-to-slab joint, ready for injection. No excavation, no slab lifting, no damage to what's already built.
Water staining down the walls of a lift pit with water sitting on the pit floor
Lift pit taking water. Awkward, wet, and the sort of place that stalls a handover — we work in them regularly.

What it costs

Most jobs land around $20,000. A small single-crack repair starts near $3,000; full remediation packages run well beyond it. Length of crack, water volume and access are what move the number — and you get a fixed price before anything starts.

Book a site assessment

Tell us what's leaking and we'll come and look at it.

A suburb and a rough idea of the area is plenty. We'll ask the rest on the phone.

Or just call 0449 997 094

Who you're dealing with

Keelson is run by Sean Meaney — 20+ years in construction, specialising in below-ground waterproofing and leak injection, with a Diploma of Building and Construction. Previously warranty and customer care manager at a Tier 1 residential builder, so the defect list and the handover deadline are familiar territory.

CoverageMelbourne metro, below-ground and hard-to-reach water ingress
AssetsBasement walls and slabs, carparks, lift pits, retaining walls, planter boxes, expansion joints
Insurance$20M public liability

Questions we get asked

Do you have to dig up outside?

No. Injection is done from the inside face, where the leak shows. Nothing above or outside gets disturbed — which is the point when the building is finished or close to it.

Will it hold, or is it a patch?

Resin injection seals the water path through the full thickness of the element, not just the surface. Done properly at the right crack it is a permanent repair, and we warrant our work.

Can you work while the site is live?

Yes. Occupied carparks, operating buildings and active sites are normal for us. We work around trading hours and traffic where we need to.

What do I get to close out the defect?

A written diagnosis of the cause, a method statement, a fixed price scope, and a close-out pack with photos and product data — the documentation a superintendent will actually accept.

Get it off the defect list.

Send us what's leaking and we'll come and look at it.

Book a site assessment Call 0449 997 094
Call 0449 997 094