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Metal roofs have an excellent reputation for longevity. Including aluminum roofing, you can expect a metal roof to last between 40 and 80 years under normal conditions and with proper maintenance. That longevity can shorten in areas where salty air is a concern and not accounted for during installation to provide additional material protections. 

On average, a roof lasts 30 years—depending on the material. Metal roofs can last up to 70 years, while zinc, specifically, can last well over 100 years. These roofs can reach their intended life span with maintenance that includes seasonal gutter cleaning, pruning nearby trees to avoid damage, and routine inspections every year.

The green coloration that develops on copper roofs is called a “patina,” and it’s a result of mild oxidation on the surface. The oxidation process is not harmful to your roof. In fact, the surface corrosion acts as a protective layer and won’t spread to the core of your copper roof materials. The discoloration will progress much more quickly in damp or humid climates than it will in dry climates. If you don’t like the green color, you can seal your roof to preserve the shiny, rose-gold look.

Common materials used include aluminum, stainless steel, galvanized steel, and copper, each selected for their properties suited to specific repair needs.