Concrete Cancer Repair in Newcastle

Concrete cancer is rusting steel inside the concrete, and the repair is licensed work: in NSW, building or trade work valued at more than A$5,000 in labour and materials, including GST, needs a contractor licence. NSW lists no licence class of its own for concrete cancer repair, so the useful question for any quote is which licence the work is done under.

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What concrete cancer repair in Newcastle actually involves

If there are cracks or pores in the concrete then water may seep in and react with the steel reinforcing to form rust. Concrete cancer is therefore a problem because the corrosion product is bigger than the metal from which it formed and also because the portion of the material that provides the strength is corroding. The rust then pushes outwards. UNSW's newsroom describes it as forcing the concrete to fracture apart in a process called spalling, more widely known as “concrete cancer”.

A concrete slab underside with a hairline crack and a rust stain along it — concrete cancer repair, Newcastle. Illustrative example.

Why it keeps growing

Corrosion that produces rust will force open bigger cracks, degrading the concrete further by progressively letting more water in. Concrete cancer is still a major concern in older buildings. The licence line is the NSW Government's own: you must have a contractor licence to carry out, advertise or contract for building or trade work valued at more than A$5,000 in labour and materials, including GST.

Ask the provider what the quote assumes about how far the steel has corroded, and who they will have look at the structure where the damage is more than cosmetic.

A flat illustration of a concrete section where a rusting bar swells and cracks the cover concrete — concrete cancer repair, Newcastle. Illustrative example.

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