Unlike other metals copper does not suffer from underside corrosion, that causes premature failures. Having a large temperature change in the mid- Ohio Valley area causes metals to sweat and the sweat eventually turns to rust. Rust is the largest factor in metal work failure, that I have witnessed on repair calls. If it rust eventually it's a bust!
Please feel free to leave any suggestions, comments, or ideas on this topic of benefits of copper roofing mid-Ohio Valley. Thank you for your time. David Reinhardt.