What does granular loss look like on a roof?

Granular loss on a roof looks like distinct areas where the textured, colored grit that coats asphalt shingles has worn away, exposing the underlying black asphalt layer. On a healthy shingle, granules provide a uniform, rough, sandy texture and consistent color. With granular loss, you will see bald spots that appear as shiny, smooth, black patches where asphalt is visible, often irregularly shaped. Early granular loss appears as thinning where shingle color looks faded or patchy and less vibrant than surrounding areas. As loss progresses, you will see dark spots that look wet or glossy compared to the matte granule surface. From the ground with binoculars, granular loss may appear as inconsistent coloring, darker patches, or areas that look worn. In gutters and at the bottom of downspouts, you will find heavy accumulation of coarse, sand-like granules that look like colored sand. On the roof surface, after rain, bald areas may show more clearly. Hail-related granular loss looks different, appearing as circular or oval spots with bruising and granules knocked off at impact points, often with a pattern. Age-related granular loss is more widespread and uniform across the roof, especially on south and west facing slopes with more sun exposure. When granular loss exposes large black areas, the shingle has lost its UV protection and is near end of life.