How long will painted aluminum siding last?
A well-done paint job on aluminum siding can last around 15 years, making the upfront effort worthwhile. Longevity hinges on solid prep: thoroughly cleaning the surface to remove chalky residue, dirt, and mildew so the new paint can adhere properly. It’s also important to paint when temperatures are between 50°F and 80°F, as extreme heat or cold can affect drying and adhesion. Steer clear of rainy days—moisture under the paint weakens adhesion and speeds up peeling or fading, which can significantly shorten the lifespan of your fresh coat.