Hail has different effects on a roof, depending on its size wind direction and speed, the age of the roof the materials it is made from, the roof`s slope etc. In any case, hail damage is bad for any type of roof because it may cause problems that lead to water leaks and other issues.
Sometimes, damage is only cosmetic but other times it is functional and more severe than it looks.
Things that can make you suspect that your roof has have hail damage include bruises, cracks, punctures, granulation loss (in the case of ceramic shingles), exposed or fractured fiberglass mat, weakened self seal strip and more.
In some cases, damage can be indirect. For example, a severe hailstorm can make tree branches fall on the roof, or clog gutters and downspouts, which will affect the performance of the roof.
Minor hail damage is often hard to be detected and requires the expertise of Centennial roofing specialists. Make sure to contact a roofing company as soon as the hailstorm is gone, to inspect your roof and ensure that everything is OK, or, if it is not, to perform the necessary repairs immediately.