Cracked slabs, spalling edges, exposed reinforcement, broken steps and failing structural concrete. We work out why the concrete failed and repair it with the right method, from crack injection to full recasting.
Concrete cracks for different reasons: shrinkage as it cures, ground movement under slabs and footings, overloading, and corrosion of the steel inside it. A shrinkage crack in a driveway and a crack caused by corroding reinforcement in a balcony need completely different repairs.
Spalling, where pieces of concrete break away from the surface, is usually caused by corroding steel. As steel rusts it expands and pushes the concrete off. In Sydney this is especially common in coastal suburbs and older apartment buildings, and is often called concrete cancer.
The right repair depends on the cause. Fine non-structural cracks may only need sealing. Structural cracks may need epoxy injection or stitching. Spalling needs the damaged concrete removed, the steel treated and the section rebuilt.
If any of these sound familiar, it is worth a free site visit. We will tell you straight what your site needs.
Cracks in house slabs, garage floors and driveways, including cracks that are widening.
Pieces breaking off slab edges, balconies, columns and soffits.
Reinforcement visible where cover concrete has fallen away.
Brown streaks from cracks, usually a sign of corroding steel inside.
Slabs that have dropped or tilted from ground movement.
Broken stair nosings, kerbs and slab edges.
Not sure if a crack is structural? Send us a photo with a coin or tape measure next to it.
We match the repair method to the cause, and bring in an engineer for structural repairs.
Flexible sealants and routing for non-structural cracks to keep water out.
Low-viscosity epoxy injected into structural cracks to bond the concrete back together.
Break-out to sound concrete, steel treatment and reinstatement with repair mortars.
Formwork and new concrete for larger damaged areas, to the engineer's design.
Repairs to slab edges, stairs, kerbs and garage floors.
Anti-carbonation coatings and sealers to slow future deterioration.
A selection of recent concrete repairs projects across Sydney.
View all projects
Every concrete repair follows the same five steps, from diagnosis to documented handover.
We attend site, inspect the defect and its surroundings, and identify the cause rather than just the symptom. Where needed we take photos, moisture readings and cover measurements.
We coordinate a remedial or structural engineer where required and agree a written scope of works that fixes the cause, not only the visible damage.
You receive a clear, itemised written quote with methodology, materials, access, programme and any approvals. No vague lump sums.
Our crew carries out the work to the engineer's specification and Australian Standards, with progress photos and hold-point inspections at each critical stage.
Final inspection, clean-up and a handover pack: photos, product data, engineer sign-off where applicable, and your statutory warranty under the Home Building Act 1989.
Photos, product data and engineer sign-off where required, so owners, strata committees and insurers can see what was done.
Concrete repairs fail when the cause is ignored or the damaged concrete is not fully removed. We fix the cause and repair to specification.
We diagnose why the defect happened. Patching over the symptom is why so many repairs fail twice.
DBP General Unrestricted (BUP4254812). Qualified for Class 2 apartment remedial work under the Design and Building Practitioners Act 2020.
Builder Licence 384697C, $20M public liability, workers compensation and HBCF cover where required.
We work with remedial and structural engineers from diagnosis to sign-off, so the fix is designed, not guessed.
Photos, product data, hold-point records and certification. Exactly what strata committees, insurers and buyers ask for.
Hands-on remedial and heritage work across Sydney since the 1970s, including jobs other builders turned down.
Real reviews from homeowners, strata and builders.
Constatine and his team did an excellent job repairing and waterproofing our garage ceiling and walls, which had been affected by concrete cancer and sandstone erosion. Constatine is highly experienced in remedial works and provided clear advice, transparent costings, and recommended the best products available to ensure a long-lasting result. We highly recommend METCON for specialist remedial works.
I couldn't be more pleased that I found Constatine and his team to assist our strata building with landscaping, waterproofing, and concrete cancer repairs. He was knowledgeable, reliable, patient, and deeply committed to achieving the best result for everyone involved. I am 100% confident that the work completed will stand the test of time. He will absolutely be my go-to moving forward, and I have no doubt we will work together again.
My partner and I own an original 1920s semi-detached home in Vaucluse, with complex sandstone foundations and multiple structural challenges caused by previous defective works. After years of delays, failed consultants, and no progress, I met Constatine and his team. From the beginning, I was impressed by the detailed review of our plans and the identification of numerous discrepancies that previous builders had missed. The team supported us through lengthy council negotiations, neighbour consultations, and COVID-related delays, even before contracts were signed. Once construction commenced, Constatine and the Meteora Constructions team were exceptional. Progress remained on schedule despite heavy rain, unforeseen structural issues, and highly complex underpinning works that previous builders had refused to undertake. They completed the work efficiently and at significantly less cost than other builders had quoted. I cannot speak highly enough of Constatine and METCON Remedial Services. It is no understatement to say that engaging Constatine and his team saved not only our project, but probably our marriage as well.
Straight answers from the builder. Anything else, just ask.
Yes. Non-structural cracks can be sealed, structural cracks can be bonded with epoxy injection, and spalled areas can be broken out and rebuilt. The right method depends on why the concrete cracked.
Usually corrosion of the steel reinforcement. Rusting steel expands and pushes the concrete off, which is why spalling is often called concrete cancer.
Structural repairs to slabs, beams, columns and balconies should be specified by an engineer. Small non-structural repairs often do not need one.
Remedial problems rarely come alone. Leaks cause concrete cancer, damp causes render failure. We fix the whole chain.
Back to Remedial BuildingPlain-language guides from our team on the questions we are asked most.
Homes, strata buildings, carparks and commercial buildings across Sydney and surrounding NSW.
A few photos of the cracking or spalling, with something for scale, is enough for an initial view.
