Concrete is one of the most common structural materials in Sydney buildings, but it's also one of the most vulnerable to long-term deterioration. At Atomic Projects, we specialise in remedial concrete repairs — diagnosing the root cause of damage, specifying the right repair system, and restoring structural integrity that lasts.
Whether it's a strata building with exposed spalling on balcony soffits, a commercial car park with reinforcement corrosion, or a heritage structure with crack-induced water ingress, our teams deliver repairs to the relevant Australian Standards, including AS 3600 (Concrete Structures) and manufacturer specifications for all applied repair materials.
How We Approach Concrete Repairs
- Thorough diagnostic assessment first: We start by identifying the cause of damage — not just treating the symptom. This includes core sampling, carbonation depth testing, half-cell potential surveys, and visual crack mapping to understand the scope and severity before any cutting begins.
- Correct surface preparation: We hydrodemolish or mechanically break out all deteriorated concrete to a sound substrate, exposing and treating corroded reinforcement with approved anti-corrosion coatings (typically zinc-rich epoxy primers) before any patching material is applied.
- Specification-driven repair systems: Repair mortars and micro-concretes are selected to match the original substrate in strength, permeability, and thermal movement characteristics. We use only tested and approved products from leading suppliers such as Sika, Parchem, and Mapei.
- Quality assurance at every stage: Our site supervisors conduct pull-off adhesion tests, inspect all surface preparation, and photograph every repair location before, during, and after works. All QA records are compiled into a post-repair report provided to owners and engineers.
- Protective coating application where warranted: For large-scale or high-exposure concrete elements, we apply penetrating sealers or elastomeric protective coatings to extend the life of the repaired structure and reduce future maintenance frequency.
Frequently Asked Questions
What is concrete cancer and does my building have it?
Concrete cancer occurs when moisture and oxygen penetrate the concrete cover, causing the embedded steel reinforcement to corrode. As the steel rusts, it expands, cracking and spalling the surrounding concrete. Common signs include rust staining on concrete surfaces, blistering or delaminating concrete, cracking that follows the line of reinforcement, and visible structural steel. It's very common in Sydney's coastal environment. See our detailed page on Concrete Spalling & Cancer Repair for more information.
How long do concrete repairs last?
When properly specified and installed, concrete repairs using modern polymer-modified mortars should last 15–25+ years. The longevity depends on surface preparation quality, product selection, and the application of appropriate protective coatings. We provide product warranties and a documented QA record to support every repair.
Do you provide engineering sign-off for structural concrete repairs?
Yes. For structural repairs — particularly those involving load-bearing elements such as columns, beams, and transfer slabs — we work closely with the building's structural engineer. The engineer specifies the scope and repair methodology, and we can arrange an independent engineer to inspect and certify completed works where required.
Can concrete repairs be done while residents are in the building?
Most concrete repairs can be staged to allow continued building occupancy. We implement dust suppression, noise management protocols, and resident communication plans to minimise disruption. For particularly disruptive works such as hydrodemolition or large-scale slab repairs, we stage works to limit access impacts and schedule noisy operations within agreed hours.
What's the difference between a patch repair and a full concrete repair program?
A patch repair addresses a single identified failure point and is appropriate for isolated, early-stage damage. A full concrete repair program involves a systematic building-wide condition survey, prioritisation of all affected elements, and a staged multi-year repair schedule. For strata buildings, a programmatic approach is usually more cost-effective and allows for planned capital works budgeting. Our Building Investigations & Reporting service can assess your building and help develop a repair program.
Related Services
Ready to get started? Atomic Projects is a Class 2 Registered Builder with over 10 years of experience in remedial works across Sydney. We work with strata managers, owners corporations, and building owners to deliver concrete repairs that are properly specified, properly installed, and properly documented.
📞 Call Us: 0410 515 509 | ✉️ Email Us: hello@atomicprojects.com.au
— Ben Tran, General Manager, Atomic Projects
