Different parts of the country are susceptible to devastation from extreme hailstorms. Clay and concrete roof tiles can resist damage from hailstones as large as 1.5”, just larger than a golf ball.
A tile roof system provides two layers of protection from the elements. The tile itself provides a tough water-shedding outer shell. An underlayment of asphalt roofing paper over the roof decking provides the inner shell if the tile was struck by extremely large hailstones.
This is real protection that few other roofing systems can provide.
Photo Right: An ice cannon is used to impact a roof with simulated hailstones. Tiles are mounted onto test panels that simulate real-life conditions. The cannon produces terminal velocities that real hail would achieve in free-fall or wind-driven conditions.