Concrete Cancer Repair

Concrete Cancer Repair on the Northern Beaches

Rust never sleeps. When the steel inside your concrete corrodes it expands and cracks the concrete apart — and it only accelerates. We diagnose the real cause, treat the steel and repair it once, for homes across the Northern Beaches and North Shore.

Book a Site Assessment

See Our Remedial Projects

or call 02 9940 2229

WHAT IS CONCRETE CANCER?

If your concrete is cracking, rust-staining or flaking, this is usually why.

Concrete cancer (concrete spalling) is what happens when the steel reinforcement inside concrete corrodes. As the steel rusts it expands — up to seven times its size — forcing the concrete to crack, bubble and break away. Left untreated it spreads, and the repair only gets bigger and more expensive.

Cracking along beams and slab edges

Following the line of the steel below.

Rust stains bleeding through

Brown streaks on walls, soffits and balconies.

Concrete flaking or “spalling”

Pieces lifting, bubbling or falling away.

Exposed, rusting steel

Reinforcement visible where concrete has broken off.

Drummy concrete

Hollow-sounding areas when tapped.

Worst on balconies, driveways & coastal homes

Where salt and water reach the steel.

If you’re seeing any of these, it won’t fix itself — and every month it costs more.

WHAT WE REPAIR

Concrete cancer, wherever it’s taken hold.

We repair concrete cancer across the elements where it most commonly appears — treating the cause, not just the surface.

Balconies & planter boxes

The most common concrete-cancer site on homes.

Balcony Waterproofing →

Suspended slabs & beams

Structural concrete restored to profile.

Driveways, garages & retaining walls

Ground-level concrete that cracks, lifts and spalls.

Façades, soffits & eaves

Overhead and vertical repairs, access included.

Coastal & salt-affected concrete

Chloride-driven corrosion is our specialty.

Pool surrounds & coping

Cracked, spalling concrete around pools and paving.

HOW WE WORK

Diagnose the cause, treat the steel, protect it for good.

A cosmetic patch traps the problem and it returns worse. Proper repair means getting to the steel, stopping the corrosion, and protecting it so water can’t start the cycle again.

Site assessment

We inspect and test to find the extent and the cause — chlorides, carbonation, water ingress.

Diagnosis & scope

We confirm the corrosion mechanism and define exactly what needs doing, with an itemised quote.

Repair

Expose and remove drummy concrete, clean and treat the steel (inhibitors / anodes), rebuild with high-bond mortars.

Protection

Waterproofing and protective coatings so water can’t reach the steel again.

Certification & handover

Clear documentation (and support for any insurance claim), and a home that’s fixed once.

“

We had rust stains and cracking spreading across our balcony and were bracing for the worst. Beaches Group found the cause, treated the steel properly and rebuilt it — two years on, not a mark. Done once, done right.

— Jackson, Avalon

NORTHERN BEACHES SPECIALISTS

Concrete cancer is worst near the coast — and that’s where we work.

We repair concrete cancer in homes across the Northern Beaches and North Shore — where salt air and moisture drive chloride corrosion in balconies, suspended slabs and façades.

Palm Beach
Avalon
Newport
Mona Vale
Manly
Mosman
Freshwater
Manly
Mosman

WHY BEACHES GROUP

Why homeowners trust us with concrete cancer.

Concrete cancer only stays fixed if the steel and the cause are treated. Here’s what sets our repairs apart.

We diagnose the cause

Not just the visible damage — so the repair actually holds.

Engineered, documented repairs

Methods and reports that stand up for you and any insurance claim.

Fixed once

Treat the steel and protect it, so the cancer doesn’t return.

Minimal disruption

Staged works and safe access for occupied homes.

Transparent scope and pricing

You see what’s wrong and exactly what it takes to fix.

COMMON QUESTIONS

Concrete cancer, answered.

What is concrete cancer?

Concrete cancer (concrete spalling) is when the steel reinforcement inside concrete rusts, expands and cracks the concrete apart. It shows as cracking, rust stains, bubbling or flaking concrete, and exposed steel. Left alone it accelerates.

Can concrete cancer be fixed, or does it mean demolition?

In the large majority of cases it’s repaired, not demolished. The key is treating the steel and the cause — not just patching the surface. We remove the affected concrete, treat and protect the reinforcement, rebuild the concrete and waterproof it so it doesn’t return.

How much does concrete cancer repair cost?

It depends on the extent, the access (balcony vs driveway vs facade) and the cause, so we price against your home after a site assessment. You get an itemised scope and quote before any work starts — no guessing from a photo.

Do you work on homes only?

Yes — we focus on residential homes across the Northern Beaches and North Shore. Concrete cancer is especially common in coastal homes here — on balconies, suspended slabs, driveways and pool surrounds.

How urgent is it?

Concrete cancer only spreads — the rusting steel keeps expanding. The sooner it’s assessed, the smaller and cheaper the repair, and the lower the risk of falling concrete. A site assessment is the safe first step.

Where do you work?

Across the Northern Beaches and North Shore — concrete cancer is especially common in coastal homes here.

SEEING THE SIGNS?

Book a site assessment.

Send us a few photos and what you’re seeing, and we’ll assess it. Or call 02 9940 2229.