Hail impact may cause latent damage that can, over time, result in premature aging of the shingles. Without obvious visual damage, there is no real way to be sure how much, if any, damage shingles have encountered. Latent damage caused by hail or severe weather may not be apparent until months or years later and may cause the shingles to age prematurely. This excellent article from our partner GAF explains how hail affects the longevity and effectiveness of your asphalt roof system.