The answer to 'why is my skylight hail damage' is that hail impact is one of the most common causes of skylight damage. Hail can crack, chip, or even completely shatter the skylight glass, leading to leaks and other issues.
Symptoms of hail damage to a skylight include visible cracks, chips, or holes in the glass, as well as water leaks around the skylight frame. If the damage is severe, the skylight may need to be completely replaced to prevent further water intrusion and interior damage.