Is it normal for shingles to lose granules?

Yes, it is normal for shingles to lose some granules over their lifespan, but the amount and timing determine whether it is normal aging or premature failure. Asphalt shingles are coated with ceramic-coated mineral granules that protect asphalt from UV radiation, provide fire resistance, and add color. During manufacturing and shipping, some loose granules are not fully embedded, so it is normal to see some granules in gutters and downspouts during the first year after installation, often called initial shedding. Throughout the roof's life, gradual granule loss occurs due to weathering, rain, thermal expansion, and foot traffic, with increasing loss as the roof ages past 15 years. Seeing a small amount of granules in gutters during annual cleaning is normal. However, excessive granule loss is not normal and indicates advanced aging or damage. Signs of abnormal loss include bald, shiny black spots where asphalt mat is exposed, heavy accumulation of granules clogging gutters and downspouts, and granules visible at the base of downspouts after rain. Hail damage can cause distinct circular areas of granule loss with bruising. If granule loss is widespread and the roof is 20 plus years old, it indicates the roof is near end of life and UV protection is compromised, requiring replacement planning. Never pressure wash shingles, as it causes abnormal granule loss.