Hail damage can cause various issues on shingles, including granule loss, exposing the underlying asphalt, and reducing UV protection. It can also result in dents, cracks, or punctures, compromising the shingles' integrity and increasing the risk of leaks. Fiberglass or asphalt shingles may display circular impact marks or a softened bruised appearance. Damage patterns may be random, and the severity depends on hail size, density, and wind conditions. Prompt assessment and repairs are essential to prevent further deterioration.

Hail size capable of causing roof damage depends on factors like shingle material and age. Generally, hailstones with a diameter of 1 inch (about the size of a quarter) or larger pose a risk to most types of roofing materials. However, even smaller hailstones can cause damage to older or already weakened roofs. The extent of damage depends on hail size, density, wind conditions, and the roof's resilience. Inspections after hailstorms can help detect and address potential issues.