Fiberglass Backing:
When hail impacts an asphalt shingle, it tends to break the “Spine” (fiberglass backing) of the shingle, which makes the shingle lose its ability to hold its granules.
Granule Loss:
As it rains, the granules will continue to wash away, exposing the asphalt underneath and leaving it vulnerable to UV Rays. The sun’s rays will eat away at the asphalt, making the existing holes larger over time and reducing its resistance to water.