Granule Loss on New Shingles
If you’ve recently replaced your roof and spotted what looks like shingle grit in your gutters or on the ground, you’re not alone. Granule loss on new shingles is a common concern among Iowa homeowners. But how much is too much? And what does it mean for the longevity of your new roof?
Key Takeaways on Granule Loss on New Shingles
- Light granule loss is normal for new asphalt shingles.
- Excessive or patterned granule shedding could signal installation or product issues.
- Granules protect shingles from UV damage and impact wear.
- Gutters and downspouts are good indicators of granule buildup.
- Professional inspection helps determine if action is needed.
What Are Shingle Granules?
Asphalt shingles are topped with ceramic-coated mineral granules that give them color, texture, and most importantly, protection. These asphalt shingle granules act as a shield against ultraviolet rays and physical wear, helping the shingles last through Iowa’s extreme seasonal conditions. Roof shingles rely on these granules for both their protective qualities and their color retention.
During manufacturing and transportation, some loose granules settle onto the surface. Not all granules are fully attached during the manufacturing process, which is why some may shed early. Asphalt shingle granules are manufactured to adhere to the shingle surface, but some may not be completely attached. This means that even brand-new shingles may shed a noticeable amount early on—especially after the first rain or during the initial few months of weather exposure. Rainwater can wash away these loose granules, which is a normal occurrence after installation.
Introduction to Asphalt Shingles
Asphalt shingles are one of the most widely used roofing materials for residential homes, thanks to their balance of affordability, durability, and versatility. Each shingle is constructed with a sturdy layer of asphalt, which is then coated with embedded granules. These granules are more than just decorative—they serve as a critical shield, protecting the roof from harmful UV rays that can accelerate aging and deterioration. The granules also enhance fire resistance, adding an extra layer of safety for homeowners.
Asphalt shingles remain a top choice for roof replacement projects because they are easy to install, repair, and maintain. Their design allows for quick installation, which can help minimize disruption to your home. With a variety of colors and styles available, asphalt shingles can complement any architectural style while providing long-lasting protection. Understanding the role of embedded granules and the overall structure of asphalt shingles is key to ensuring your roof’s longevity and performance.
Normal Granule Loss: What to Expect
In the first weeks following a roof replacement, it’s a common occurrence to find granules accumulating, especially with a new roof. You may notice:
- Accumulating at the bottom of downspouts
- Washed into gutters after rainfall, sometimes forming a pile of granules
- Scattered around your home’s perimeter
This initial shedding is typically superficial. The granules you see in the gutter or as a pile are excess from the manufacturing process and not a sign of shingle failure. If your shingles were installed by certified professionals, like the in-house teams at Waddle Exteriors, early granule loss shouldn’t affect performance.
When Granule Loss Becomes a Problem
Excessive or uneven granule loss may indicate a problem, especially if it occurs outside the first few months or if you notice:
- Bare shingle spots revealing black asphalt
- Patterned loss (e.g., lines, patches, or streaks)
- Discoloration or shiny areas on the roof
- Leaks or heat buildup in the attic due to UV exposure
- Tears, blistering, or flaking on the shingle surface
These are clear signs of shingle granule loss and may require professional attention.
These signs could be related to:
- Manufacturing defects
- Improper installation
- Physical impact (such as hail or tree branches)
- Foot traffic or tools used during installation
- Common causes include improper roof installation, cutting corners during repairs, and using inexperienced roofing contractors.
Excessive granule loss or granular loss can result from losing granules at different rates as the roof ages.
As a roof experiences aging, older roofs are more likely to show signs of shingle granule loss, changes in roof color, and may eventually need to be replaced or require replacing individual shingles. As the roof ages, losing granules becomes more common, and these issues can indicate the need for further inspection or repair.
Consulting a roofing professional or roofing professionals is recommended if you notice excessive granule loss or other signs of deterioration.
Why Granules Matter for Iowa Roofs
Granules do more than give your shingles color. They provide crucial UV resistance, which helps extend the life of the asphalt layer beneath. They also add fire resistance and improve impact durability—key considerations in regions like Des Moines and Ames where summer storms and winter extremes can be harsh on roofs. An asphalt roof relies on granule coverage to maintain its durability and appearance.
A roof without proper granule coverage ages prematurely, leading to:
- Cracked or brittle shingles
- Increased attic temperatures
- Premature leaks
- Higher energy bills
That’s why keeping an eye on granule loss is essential to protecting your home and your investment.
How to Check for Granule Loss
Homeowners can do simple checks by:
- Observing the ground after rainfall
- Inspecting gutters during seasonal cleaning
- Looking up at the roof for discoloration or patchy areas
However, walking on the roof is not recommended, as it can cause further damage or personal injury. Instead, schedule a professional roof inspection if you have concerns. A qualified roofing contractor or roofing professional can thoroughly assess your roof, address any worry you may have about granule loss, and ensure your roof’s integrity. At Waddle Exteriors, we offer free in-home consultations and roof assessments to help you determine whether granule loss is normal or problematic.
Explore more on what to look for in roof replacement.
Can Granule Loss Be Repaired?
Minor, early-stage granule loss does not require repair. But if your roof is showing signs of premature aging or damage:
- Affected shingles may need to be replaced
- Flashing or ventilation may need adjustment
- Additional attic insulation may help reduce heat buildup
In cases of storm-related granule loss, Waddle Exteriors supports Iowa and Nebraska homeowners with insurance-related restoration services. While we do not handle claims, we coordinate with your insurance company to ensure repairs align with policy requirements.
Preventing Early Wear: Installation Matters
Not all roofing crews are created equal. Subcontractors and improperly trained installers may mishandle shingles during roof installation, scraping off protective granules with tools or foot traffic. Installers who cut corners during roof installation may also loosen granules and compromise the roof’s protective layer, leading to potential issues down the line. That’s why Waddle Exteriors uses full-time, certified crews for every job—not temporary or outsourced labor.
Our expertise ensures your shingles are installed according to manufacturer guidelines and Iowa building codes, reducing the risk of premature granule loss.
Explore our roofing services in Iowa to see how we help homeowners protect their roofs year-round.
Storm Damage and Granule Loss
Severe weather, especially hail storms, can have a major impact on the health of your asphalt shingle roof. Hail damage is a common cause of significant granule loss, as the force of hailstones can dislodge granules from the surface of the shingles. When this protective layer is compromised, the underlying asphalt becomes exposed, making the roof more vulnerable to rain, snow, and ice. This exposure can accelerate wear and lead to issues like leaks or even the need for a full roof replacement.
Homeowners should be vigilant after storms, looking for signs such as bald spots or areas where granules have washed away. These are clear indicators that the roof’s protective layer has been damaged. Regular roof inspections, especially after severe weather events, are essential for determining the extent of granule loss and deciding whether repairs or replacement are necessary. Addressing storm damage promptly helps maintain the integrity of your roofing system and protects your home from further issues.
Asphalt Shingle Roof Benefits
Choosing an asphalt shingle roof comes with a host of advantages for homeowners. Asphalt shingles are known for their cost-effectiveness and long-lasting durability, making them a smart investment for any property. The embedded granules on each shingle form a protective layer that shields the roof from harmful UV rays, helping to prevent premature aging and deterioration. This layer also contributes to the fire resistance of the roof, providing added peace of mind.
Another benefit of asphalt shingles is their versatility. Available in a wide range of colors and styles, they can enhance your home’s curb appeal while delivering reliable performance. Asphalt shingle roofs are relatively easy to install and maintain, and with regular roof inspections and timely repairs, they can last for decades. By understanding the benefits and addressing common issues like granule loss, homeowners can ensure their asphalt shingle roof remains in top condition, reducing the likelihood of early replacement and keeping their home safe and secure.
FAQs About Granule Loss on New Roofs
Is it normal for new shingles to lose granules?
Yes. Light shedding is common in the first few weeks as excess granules from manufacturing wash away.
How can I tell if the granule loss is excessive?
Look for bare spots, streaks, or consistent granule piles in gutters. A professional inspection is the best way to assess severity.
Does granule loss mean my shingles are defective?
Not necessarily. Defects are rare, but pattern loss or early balding areas could indicate an issue worth inspecting.
Will my warranty cover granule loss?
Warranty coverage varies by manufacturer. Waddle Exteriors can help you review your warranty and product details.
Can Iowa weather cause granule loss?
Yes. Hail, wind, and freeze-thaw cycles are known to cause damage to roofing materials, including granule loss.
Request a Roof Assessment from Waddle Exteriors
If you’re seeing granule loss on your new shingles and aren’t sure whether it’s normal, let our certified roofing team take a look. We serve homeowners in Des Moines, Ames, Story City, and surrounding areas.
Call (877) 733-6400 or schedule your free in-home consultation today to protect your roof and your home for years to come.
