Roof problems
Shingle granules in your gutters: what it means
A small amount of granules in the gutters is normal, especially in the first year after a new roof. A steady stream of granules from an older roof, or bare, dark patches on the shingles, means the shingles are losing their protective layer. Once the asphalt is exposed to sun, shingles crack and curl faster.
Updated October 3, 2026
- What it looks like
- Sandy, colored grit in the gutters and piled at the downspouts, sometimes with bald, darker patches on the shingles.
- What it usually means
- A little after a new roof or a heavy storm is normal. A steady stream from an older roof means the shingles are losing their protective layer.
- How urgent
- Not urgent on its own. Paired with curling, cracking or leaks, it’s time to plan a replacement.
- What to do next
- Photograph the gutters and the roof from the ground and note the roof’s age. If it’s 15 years old or more, see a replacement price for your house at thethomasroofing.com.
What granules do
The ceramic-coated granules on asphalt shingles block sunlight, give the roof its color and add fire resistance. Without them, the asphalt underneath dries out and turns brittle.
When it’s normal and when it isn’t
- Normal: loose granules after a new roof is installed, and a light sprinkling after heavy rain
- Worth watching: granules piling up at the downspouts year after year
- A sign of wear: bald spots on shingles, or granules along with curling or cracking
- After hail: fresh dark spots where granules were knocked off
Why it matters for the roof’s life
Granules are the shingle’s sun shield. Once the asphalt underneath is exposed it dries out, cracks and curls, which is why heavy granule loss usually shows up alongside the other signs of an aging roof. A National Association of Home Builders study put asphalt shingle roofs at about 20 years.
What to do
Photograph the gutters and the roof from the ground. If the roof is 15 years old or more and granules are piling up, it’s a good time to see a replacement price and plan the timing.
Sources
See a price range for your own roof
About 10 minutes, from aerial measurement. No salesperson.