Aluminum siding first began appearing on homes in the early 1960s. This new product occasionally experienced corrosion, especially in areas of high humidity or salty ocean winds. Aluminum siding is still used today, but is not nearly as popular as vinyl. Aluminum planks can dent easily and are difficult to replace. Dark colors tend to fade in the sunlight. This type of siding does last indefinitely, but may wear cosmetically. Cosmetic repairs to aluminum siding can be costly and difficult.