Concrete cancer is caused when the steel reinforcing within a concrete slab begins to rust. As the steel rusts, it expands and displaces the surrounding concrete; causing it to become brittle and crack which exacerbates the issue.
Signs of concrete cancer include:
- Delaminated and cracking concrete (concrete spalling)
- Rust stains which seem to leak out from within the concrete
- Bubbling (also called plating) of concrete render
- Leaks which appear in overhead concrete surfaces
A range of factors can contribute to concrete cancer
Your building may have spalling concrete for a number of reasons, including:
- A poorly-poured substrate which has allowed moisture to seep into it through cracks and voids
- Inadequate preparation of the reinforcing steel when the original concrete was poured.
- The ends of the reinforcing are too close to the surface. In heavy rains, water may seep through causing lime and other chemicals in the steel to oxidise.
- Incompatible metals being used in close proximity to each other, thus causing a reaction which allows water into the slab
- Stress fractures from bearing weight or general wear-and-tear allow water to penetrate the concrete and react with the steel
To discuss your building and concerns about concrete spalling, concrete cracking and concrete cancer.
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Concrete Repair
Treat the signs of concrete spalling, cracking and delamination.

Structural Building Solutions
You can be assured of quality workmanship and a specialised solution that covers structural remediation of concrete, steel or timber.

Building Façade Repairs and Upgrades
When it comes to your building façade maintenance and refurbishment, we create a customised solution based on budget and desired results.

Concrete Repair
Treat the signs of concrete spalling, cracking and delamination.

Structural Building Solutions
You can be assured of quality workmanship and a specialised solution that covers structural remediation of concrete, steel or timber.

Building Façade Repairs and Upgrades
When it comes to your building façade maintenance and refurbishment, we create a customised solution based on budget and desired results.
LATEST NEWS
Stay up to date on the latest thoughts, trends and news in building repair and maintenance

23 May 2022. By Jeff Anderson
Once you find evidence of concrete spalling or concrete cancer, you need to act to prevent ongoing damage. Learn what you need about your options and how to fix concrete cancer.

26 April 2022. By Lubosh
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