Today's tip, how to recognize roof damage from hail, comes from a Dallas roofer. Signs of hail damage to a roof include: Broken pieces of shingles on the ground; broken shingles up on the roof; puncture marks in the roof. Flat roofs suffer more during sever hail storms than sloped roofs. Older roofs are more prone to hail damage than newer roofs. South facing roofs are often the most-susceptible to hail damage, compared to sides of the roof that get less direct sunlight.