After a strong spring storm moves through the St. Louis and Metro East area, many homeowners notice dark, sand-like granules in their gutters, driveway, or yard. The first question is often, “Is something wrong with my roof?” The answer depends on what caused the granule loss, how much you see, and the age and condition of your roof. Some granule loss is a normal part of owning a roof. A sudden and large amount of granule loss after a storm may be a sign of damage. In this guide, we’ll explain what causes granule loss, when it may be normal, and when it may be time to have your roof inspected.
What Are Roof Granules, and Why Do They Matter?
Asphalt shingles have several layers. One of the top layers is made of small mineral pieces called granules. These granules help protect the asphalt underneath from the sun and weather. They also help the shingles shed water and handle normal wear. Over time, some granules will come loose. You may notice them in your gutters, near your downspouts, or on your driveway after heavy rain.A small amount of granule loss can be normal. What matters is how much you see, when you see it, and whether there are other signs of damage.
Normal Granule Loss: What to Expect
Every asphalt shingle roof loses some granules over time. This is a normal part of the roof’s life.
New Shingles
New shingles may lose some loose granules during the first year or two after installation. These are often granules that did not fully stick during the manufacturing process. Rain and normal weather can wash them into your gutters. Seeing some granules on a newer roof does not automatically mean there is a problem.
Shingles in the Middle of Their Life
As a roof gets older, it will continue to lose some granules. On a roof that is still in good condition, this loss is usually slow and spread out over time. You may see a small amount of granules in your gutters after a heavy storm.
Older Shingles
As shingles get older, they may begin to lose granules at a faster rate. Years of sunlight, rain, wind, and temperature changes can wear down the shingles. This can be a sign that your roof is aging, but it does not automatically mean you need to replace the entire roof. The condition of the roof should be looked at as a whole.
How Much Granule Loss Is Normal?
A light layer of granules in your gutters after a storm can be normal. But if you see large amounts of granules, bare areas on your shingles, or other signs of damage, it may be time for an inspection.
Abnormal Granule Loss: When It May Be a Warning Sign
Sometimes granule loss happens much faster than normal aging. This can happen after hail, high winds, falling branches, or other severe weather.
After Hail
Hail does not always leave a large dent that you can easily see. A hail impact can damage the shingle and knock loose granules from the surface. Some damage may be difficult to see from the ground. If you notice a large increase in granules after a hail storm, a roof inspection can help determine whether there is other damage.
Bald Spots on Shingles
If you see areas where many granules are missing and the material underneath is exposed, the area should be checked. Bare spots may be caused by storm damage, normal aging, or other problems. Once the protective granules are gone, the exposed material has less protection from the sun and weather.
Granules in One Area
If granules are collecting in one part of the roof or around one damaged area, something may have caused extra wear in that location. For example, a tree branch or storm debris may have scraped the shingles. A professional can look at the area and help determine what happened.
Heavy Granule Loss on a New Roof
Some granule loss is normal on a new roof. However, if you notice a large or ongoing amount of granule loss beyond the early period after installation, contact your roofing contractor. They can check the shingles and installation to see if there is a problem that needs attention.
Asphalt Streaking
You may also notice dark asphalt marks on shingles or in your gutters. When this happens along with heavy granule loss, it may be a sign that the shingles are aging or breaking down. A closer inspection can help determine the cause.
Why Context Matters: Storm Type, Roof Age, and Materials
Seeing granules after a storm does not automatically mean your roof is damaged. The bigger picture matters.
The Type of Storm
Different storms can affect a roof in different ways. Heavy rain and wind may cause some normal granule loss. Hail can cause more direct impact to shingles. Strong straight-line winds can also lift or damage shingles. The strength of the storm, the condition of the roof, and the type of damage all matter.
Roof Age
The age of your roof is another important factor. A newer roof with a sudden change in granule loss after a storm may need a closer look. An older roof may naturally have more granule loss because it has been exposed to years of weather. Roof age alone does not tell you whether damage is covered by insurance or whether a roof needs to be replaced. That decision depends on the condition of the roof, the cause of the damage, and your insurance policy.
Shingle Quality
Different shingles are made with different materials and designs. For example, Owens Corning Duration shingles are designed with features that help protect against weather when installed according to the manufacturer’s requirements. The type of shingle used on your home can affect how it ages and how it handles weather.
Weather Over Time
One storm may not tell the whole story. If a roof goes through several severe storms in one season, the combined wear may be greater. A roof that already has some damage may also be more likely to show problems after another storm.
Roof Pitch and Sun Exposure
The shape and location of your roof can also affect granule loss. Steeper areas may shed water and debris more quickly. Lower-slope areas may hold more water and debris. South- and west-facing areas also get more sunlight, which can lead to more weathering over time. These differences do not automatically mean a roof is failing. They are simply part of understanding how a roof wears.
When to Call for an Inspection
Seeing granules after a storm does not automatically mean you need a new roof. It does mean you may want more information.
Consider an Inspection Soon If:
- You see water stains on ceilings or walls.
- You notice missing shingles.
- You see large areas where the shingle surface is missing.
- Your home was hit by a major hail or wind storm.
- You notice a large amount of granules after a storm.
- Granules continue to collect in your gutters well after the storm.
An Inspection May Also Help If:
- Your roof is newer and you notice unusual granule loss.
- You are concerned about damage that you cannot see from the ground.
- You are selling your home and want to understand the roof’s condition.
- You are planning a major home project and want to know what condition the roof is in.
You May Be Able to Monitor If:
- You only see a small amount of granule loss after normal weather.
- Your roof is newer and otherwise looks to be in good condition.
- You see some normal wear but no other signs of damage.
When in doubt, an inspection can give you more information before you decide what to do next.
How to Document Granule Loss
If you believe your roof may have storm damage, photos can help document what you see.
Take Photos From Different Angles
Take pictures of:
- Granules in the gutters
- Granules near downspouts
- Granules on the driveway or landscaping
- Visible roof damage
- Any water stains inside the home
Only get on the roof if you have the proper training and safety equipment.
Take Photos Before Cleaning
If you find a large amount of granules in your gutters after a storm, take pictures before cleaning them out. This can help show what you found after the storm.
Write Down the Storm Date
Make a note of when the storm happened and when you first noticed the damage. This information may be useful if you later contact your insurance company.
Contact Your Insurance Company if You Suspect Storm Damage
If you believe your roof has storm damage, you can contact your insurance company to ask about your policy and the claim process. Your insurance company will review the damage and make the final decision about coverage.
Consider a Professional Inspection
A roofing contractor can inspect areas that may be difficult to see from the ground. At Edwards & Sons, we can use photos and drone images when helpful to document what we find. If you choose to file an insurance claim, this information can help you explain the condition of your roof to your insurance company and adjuster.
The Bottom Line: Look at the Whole Story
Granule loss after a storm is common. Sometimes it is simply part of normal roof wear. Other times, a sudden increase in granule loss may be a sign of storm damage. The important thing is to look at the whole picture.
Consider:
- How much granule loss you see
- When you noticed it
- The age of your roof
- The type of storm
- Whether shingles are bruised, cracked, lifted, or missing
- Whether you see water damage
A newer roof that suddenly shows heavy granule loss after a hail storm may need a closer look. An older roof that has slowly lost granules over many years may simply be showing normal signs of age. If you are not sure what you are seeing, an inspection can help.
At Edwards & Sons, we provide roof inspections and can use photos and drone images when helpful. We will explain what we find and help you understand your options. If your roof only needs a repair, we will explain that. If we find damage that may require more work, we will show you what we found and discuss the next steps.If you decide to file an insurance claim, we can help document the damage and communicate with your adjuster. Your insurance company makes the final decision about coverage.With more than 50 years of experience and more than 5,000 completed roofing projects, Edwards & Sons has helped homeowners across Illinois and Missouri understand and care for their roofs.
Our goal is simple: look at your roof, explain what we find, and help you make an informed decision about what comes next.
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