A metal roof may lower your homeowners insurance premium, but installing one does not automatically earn you a discount. Insurance companies care less about the word metal than about what the roof can actually withstand. A qualifying impact-resistant roof may earn a premium credit from some insurers. Fire resistance, wind resistance, roof age and installation can matter too. There is also a catch homeowners should understand before celebrating the savings: some insurers offer a metal-roof discount while excluding purely cosmetic hail damage. Your premium could go down while your coverage for dents goes down with it. And because a high-quality More…