What it is: Aluminum siding is a lightweight metal option that offers rust resistance and durability, though it’s less common than steel in modern applications. Why it’s used in MN: Aluminum siding is resistant to rust, making it suitable for Minnesota’s wet and humid conditions. It’s also lightweight, which can make installation easier. Pros: Lightweight and easy to install. Resistant to rust and fire. Low maintenance. Cons: Can dent easily and may not be as durable as steel. Fewer style options compared to other materials.