Are There Hail-Proof Roofs?
No roofing material is fully hail proof. If anyone saw the hail storm that went through Dallas/Ft. Worth in the mid-nineties or the OK City hail storm of April '04, you'd know what I mean. There are hail-RESISTANT roofs. These products have Class 1 through Class 4 hail-resistance ratings, 4 being the highest. The ratings are given by taking a steel ball and dropping it from a pre-determined height and measuring the damage the roof has sustained. The American Society of Testing and Materials (ASTM) performs the tests.
Many roofs carry this rating. For steep slope, these roofs include some metal roofs, some tile and some composition shingles. For flat roofs, these are some gravel-surfaced built-up, and some spray foam (with the right coating system), and just a few others.
Installing a Class IV hail resistant roof may qualify you for lower insurance premiums, depending on where you live. Call your agent for verification. Keep this in mind, too, not many agents and adjusters will know the specifics about hail resistant roofs. Consult either a good roofing contractor or your local roofing supply warehouse; and I don't mean Home Depot or Lowe’s. Chances are they won't know about it. The ones I'm talking about the companies that specialize in roofing sales, like ABC Supply, Bradco Supply, Pacific Supply, etc.