Understanding Concrete Spalling in High-Rise Structures
Concrete spalling is one of the most serious and frequently overlooked threats to the structural health of Australia’s aging high-rise buildings. In many urban centres, particularly Sydney and Melbourne, a significant number of towers built between the 1970s and early 2000s are now exhibiting signs of spalling—ranging from cracking and delamination to exposed steel reinforcement. According to industry estimates, up to 40% of older high-rise buildings in coastal regions face some form of concrete degradation. This deterioration not only affects the building’s appearance but also undermines its structural integrity, increases risk exposure, and leads to rising insurance premiums.
