Understanding and Treating Concrete Cancer in Strata Buildings
For property buyers considering strata buildings in Sydney, and especially areas by the ocean such as Sydney’s Northern Beaches, one of the most critical structural issues to be aware of is concrete cancer. This hidden problem can lead to extensive damage and costly repairs if left untreated. At Sp. Property Buyers, we help our clients navigate this issue, ensuring they make informed purchasing decisions.
What Is Concrete Cancer?
Concrete cancer occurs when the steel reinforcement within concrete begins to rust. As the steel rusts, it expands, causing the surrounding concrete to crack and deteriorate. This can compromise the structural integrity of a building, leading to safety concerns and expensive remediation work.
Which Properties Are Most Susceptible?
In the Northern Beaches from Manly to Palm Beach, properties built between the 1960s and 1990s are particularly prone to concrete cancer. Many older strata apartment buildings constructed during this period used materials and building techniques that have since proven to be vulnerable to corrosion. Coastal exposure also accelerates the issue, as salty air and moisture infiltrate concrete structures. Common signs include:
- Cracking or spalling concrete
- Rust stains appearing on walls or ceilings
- Bubbling or flaking render
- Leaks or dampness in concrete areas
How Is Concrete Cancer Treated?
Treating concrete cancer typically involves:
- Identifying the Affected Areas – A structural engineer or specialist contractor will assess the damage.
- Removing Damaged Concrete – The deteriorated concrete is chipped away to expose rusted steel reinforcement.
- Treating and Replacing Steel Reinforcement – The steel is cleaned, treated with rust inhibitors, and sometimes replaced if significantly corroded.
- Applying New Concrete and Protective Coatings – Once the reinforcement is secure, fresh concrete is applied, and protective sealants are used to prevent future issues.
How Sp. Property Buyers Can Help
At Sp. Property Buyers, we help clients identify and mitigate the risks of purchasing properties affected by concrete cancer. Our expertise includes:
- Thorough Due Diligence – We scrutinise strata reports, building inspections, and history of past repairs.
- Engaging Experts – We connect buyers with structural engineers and remedial specialists to assess potential concerns.
- Negotiating Smartly – If a property shows signs of concrete cancer, we help buyers negotiate on price or avoid risky investments altogether.
Conclusion
Concrete cancer is a significant issue in older strata buildings across the Northern Beaches, but it doesn’t have to be a dealbreaker. With the right knowledge and expert guidance, buyers can navigate this challenge and make sound property decisions. If you’re considering a strata property and want peace of mind, let the team at Sp. Property Buyers assist you. Contact us today for expert property advice tailored to the Northern Beaches market.
Marcus Gould LREA.
Director and Senior Buyers Agent.