A Basic Guide to Granule Loss in Shingle Roofing

As a roofing company, one of the most common concerns we hear from homeowners is about granule loss. It’s a term that might sound a bit technical, but understanding what it means and how it affects your roof can save you a lot of trouble in the long run. In this blog, we will delve into what granule loss is, its synonyms, its causes, and answer some frequently asked questions to help you keep your roof in top condition.


What Is Granule Loss

Granule loss refers to the wearing away of the tiny, protective granules that cover the surface of asphalt shingles. These granules are crucial for the longevity and performance of your roof. They protect the shingles from ultraviolet (UV) rays, provide fire resistance, and add color and aesthetic appeal to your roof. While “granule loss” is the most common term, you might also hear it referred to as “shingle granule erosion” or “granule shedding.” Regardless of the terminology, the implications for your roof remain the same.

Causes of Granule Loss

  • Aging: Over time, all roofing materials will degrade. Asphalt shingles are no exception. As they age, the bond between the granules and the asphalt weakens, leading to granule loss.
  • Weather Conditions: Extreme weather conditions, such as heavy rains, strong winds, hail, and snow, can accelerate granule loss. UV radiation from the sun can also break down the asphalt, causing the granules to loosen.
  • Improper Installation: If shingles are not installed correctly, they may not adhere properly, leading to premature granule loss. This can be due to poor workmanship or the use of substandard materials.
  • Foot Traffic: Walking on your roof can dislodge granules. It’s important to limit foot traffic and use proper techniques if you must access your roof.
  • Manufacturing Defects: Occasionally, shingles may have manufacturing defects that cause granules to come loose sooner than expected.

Frequently Asked Questions (FAQs) About Granule Loss

How can I tell if my roof is experiencing granule loss?

You might notice granules in your gutters or downspouts, or see bald spots on your shingles. After a storm, check the ground around your home for granules.

Is granule loss normal?

Some granule loss is normal, especially for older roofs. However, excessive granule loss can indicate that your roof is nearing the end of its lifespan or has sustained damage.

Can granule loss be repaired?

While you can’t replace the granules themselves, you can address the underlying issues causing the loss. This might involve replacing damaged shingles or, in some cases, installing a new roof.

How often should I inspect my roof for granule loss?

It’s a good idea to inspect your roof at least twice a year, in the spring and fall, and after major storms. Regular inspections can help you catch and address issues early.

Can granule loss lead to leaks?

Yes, granule loss can lead to leaks. The granules protect the asphalt layer from UV damage, and without them, the shingles can deteriorate more quickly, leading to potential leaks.

Should I contact a professional for an inspection?

If you notice significant granule loss or other signs of damage, it’s wise to contact a professional roofing company. They can provide a thorough inspection and recommend the best course of action.


Granule loss is a natural part of a roof’s aging process, but it’s important to monitor and address it to maintain your roof’s integrity and extend its lifespan. Regular inspections, proper maintenance, and timely repairs can help you avoid more significant issues down the road. If you have any concerns about granule loss or other roofing issues, don’t hesitate to contact us. Our team of experts is here to help you keep your roof in top shape.

Feel free to reach out to us with any questions or to schedule an inspection. Protecting your home starts with a well-maintained roof!