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Granule loss is asphalt shingles shedding the protective mineral surface that shields them from UV and weather. While a little is normal, heavy or ongoing loss is one of the earliest signs your roof is aging. If you're finding granules in your gutters, it's worth understanding what's driving it and acting while your roof is still sound.
The colored mineral granules on an asphalt shingle aren't just for looks. They form a protective layer that shields the underlying asphalt from UV rays and weather. As granules wear away, the asphalt beneath is exposed, dries out faster, and ages more quickly. So granule loss isn't only a symptom of aging. It accelerates it.
Some granule loss is normal, in two situations especially:
What's not normal is heavy or sudden granule loss: enough to visibly collect in gutters and downspouts, or bare spots appearing on the shingles. That signals the roof is entering the aging window and losing its protection. See the full set of signs your roof is aging.
Beyond normal wear, the common causes are:
You don't need to climb up. Check:
Once granules are gone, the exposed asphalt is unprotected from UV, so it dries, hardens, and cracks faster. Left alone, granule loss becomes a feedback loop: less protection leads to faster aging, which leads to more granule loss. Catching it early is what keeps a roof in the treatable window instead of pushing it toward replacement.
GoNano's system is backed by more than $1 million in independent testing, including a Green Center (now Impact Chemistry) test in which a 15-year-old roof treated with NuRoof Revive outperformed a roof with brand-new shingles. It also holds UL 2218 Class 4 (impact), ASTM D3161 Class F (wind, rated to 110 mph), and UL 790 Class A (fire). A single GoNano application carries a warranty up to 20 years, 100% non-prorated on the full treatment, and it's transferable.
Granules in the gutter are your roof's early warning light. A little is normal; a lot means your roof is aging and losing its protection. Act while the roof is still sound and you can restore it. Find out whether your roof is a candidate. Wait until the exposed asphalt cracks, and replacement becomes the only option.
Find a Certified GoNano Contractor near you to check whether your granule loss is normal wear or a sign it's time to restore.
Structural Roof Rejuvenation works best when paired with a clear understanding of why roofs fail and what the alternatives cost. If you’re evaluating ice dam damage, you’ve likely come across everything from heat cables to full roof replacement. The guides below address the most common recommendations and explain what may actually be causing the problem.
It's shingles shedding the protective mineral surface that shields the asphalt beneath from UV and weather. Heavy or ongoing loss is one of the earliest signs a roof is aging.
Some is. New roofs shed loose manufacturing granules early on, and a slow trickle over years is normal wear. Heavy or sudden loss that collects in gutters is not. It signals aging.
Common causes are age and oil depletion, sun and heat breaking down the surface, storm and hail impact, foot traffic, and end-of-life shingles.
In your gutters and downspouts (sandy grit), on the ground below downspout outlets after rain, and on the roof itself from the ground (dark or bald patches).
It can be. Hail and high wind knock granules off directly and can strip large areas. Get a professional inspection. Storm damage may be repairable or insurable.
Yes. Once granules are gone, the exposed asphalt dries and cracks faster, creating a feedback loop of accelerating aging. Catching it early keeps the roof in the treatable window.
You can't stop normal wear, but if the roof is aging but sound, rejuvenation restores the oils and flexibility that hold everything together and slows further deterioration.
No. New roofs shed loose leftover granules from manufacturing for a while. That's expected. Ongoing heavy loss later on is the concern.
Often yes, if it's aging but structurally sound with no active leaks. If the asphalt has already cracked widely or the roof is failing, replacement is the right call.
Have a Certified GoNano Contractor assess the roof to tell you whether it's normal wear or a sign the roof is aging and ready to be restored.
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