How Does Hail Damage Shingles on a Roof?

Hailstones fall at high speeds, transferring significant energy upon impact with your roof. Even small hailstones can cause damage if driven by strong winds. The force can compress asphalt shingles, cracking the protective outer layer of granules. This exposes the underlying asphalt and fiberglass mat to the elements, starting a process of deterioration.

The size and density of the hail are the primary factors. Larger, harder hailstones cause more immediate and visible damage. Softer, smaller hail might only leave subtle marks that worsen over subsequent weather cycles. The angle of impact and the age of your shingles also influence the severity of the resulting damage.

The most significant risk from hail damage is its often-hidden nature. From the ground, your roof might look fine, with no obvious holes. However, the compromised shingles have lost their water-shedding integrity. The next rainstorm can drive water through these microscopic fractures or under lifted edges.

This slow water intrusion can rot roof decking, damage attic insulation, and cause stains on your ceilings. Mold can begin to grow in damp attic spaces within 24 to 48 hours. Addressing the roof damage promptly is key to preventing much more extensive and costly water damage inside your home.

A roofer will determine if repairs or a full roof replacement is needed based on the extent of the hail damage. For minor, isolated damage, individual shingles can often be replaced. Widespread bruising or cracking typically requires a new roof to ensure your home is properly protected from future weather.

If water has entered, a water damage assessment is essential. The pros will use moisture meters to find hidden dampness in walls or attic spaces. They then perform water damage cleanup, which includes drying, disinfecting, and repairing affected materials to prevent mold growth and structural issues.