No, Colorbond roofs are specifically designed to resist rust. The sheets have a protective coating that makes them durable in harsh weather conditions. Colorbond has a 30-year guarantee that protects against corrosion and deterioration caused by the sun, rain, and snow. However, rust might occur over time in extremely corrosive environments like industrial or coastal areas. Proper installation and maintenance are crucial for prolonging your Colorbond roof's lifespan.