What Causes Granule Loss On Shingles? (2024)

When you think about your home’s roof, you probably imagine it as a solid layer of protection against the elements. What you might not consider is that this durable shield relies heavily on small, seemingly insignificant particles called granules.

Granule loss on shingles is a common issue that can have significant implications for the health and longevity of your roof. This thorough guide will help you understand:

• What shingle granule loss is
• Why it happens
• What you can do about it

What Are Shingle Granules?

Shingle granules are small, coarse particles made from minerals or synthetic materials. They are embedded on the surface of asphalt shingles to provide various benefits:

• Protection from UV Rays: Granules help protect the asphalt beneath them from the sun’s harmful ultraviolet (UV) rays, which can cause the shingles to degrade.
• Fire Resistance: Certain types of granules can enhance the fire-resistant properties of shingles.
• Aesthetic Appeal: Granules come in different colors and textures, contributing to the overall look of your roof.
• Impact Resistance: Granules add an extra layer of durability, making shingles more resistant to physical damage.

Why Does Granule Loss Happen?

Asphalt shingle granule loss can be caused by a variety of factors, including

Normal Wear and Tear

Even the highest-quality shingles will experience some degree of granule loss over time. This is a natural part of aging and typically isn’t a cause for immediate concern. However, keeping an eye on the extent of granule loss can help you determine when it might be time for a roof replacement.

Weather Conditions

Severe weather conditions like heavy rain, hailstorms, and strong winds can accelerate granule loss. The impact from hailstones, for example, can dislodge granules, leaving the asphalt layer exposed to the elements.

Poor Installation

Improper installation can also contribute to premature granule loss. If shingles are not adequately secured or if they’re installed on an unsuitable surface, granule loss could occur more rapidly.

Foot Traffic

Walking on the roof can dislodge granules. It’s important to minimize foot traffic and use proper footwear when roof access is necessary.

Manufacturing Defects

In some cases, defective shingles may be the culprit. Poorly manufactured shingles may lose granules at an accelerated rate, leading to premature roofing issues.

Signs of Granule Loss

Wondering if your asphalt shingle roof is suffering from granule loss? Look for the following:

• Finding Granules in Gutters: One of the most common signs of granule loss is finding them in your gutters. While it’s normal to see some granules in the gutters, excessive amounts can indicate a problem.
• Bald Spots on Shingles: If you notice bald spots or areas where the granules appear to be missing, this is a clear sign that granule loss is occurring.
• Changes in Roof Color: Granule loss can cause discoloration or uneven coloring on your roof. If parts of your roof appear lighter or darker than others, it could be due to missing granules.
• Increased Roof Temperature: Without granules to protect the asphalt layer, your roof may absorb more heat, leading to increased temperatures inside your home. This can also accelerate the degradation of the shingles.

The Impact of Granule Loss

Loose granules may not seem particularly dangerous, but it can have serious consequences for asphalt shingle roofs.

📉 Reduced Lifespan

Granules play a crucial role in protecting the asphalt layer of shingles. When they are lost, the shingles become more susceptible to damage from UV rays and weather conditions, ultimately reducing the lifespan of your roof.

📈 Increased Risk of Leaks

Granule loss can expose the asphalt layer, making it easier for water to penetrate and cause leaks. This can lead to water damage inside your home, including mold growth and structural issues.

🏚️ Compromised Aesthetic Appeal

A roof with significant granule loss can look worn and unattractive. This can affect the overall curb appeal of your home, potentially lowering its value.

🧾 Higher Energy Bills

As mentioned earlier, granule loss can lead to increased roof temperatures. This can make it harder to maintain a comfortable indoor temperature, resulting in higher energy bills.

Preventing Granule Loss

You can avoid granule loss and protect your roof shingles by taking the following action:

• Regular Inspections: Conducting regular roof inspections can help you catch granule loss early. Look for signs like granules in the gutters or bald spots on shingles. It’s a good idea to have a professional inspection at least once a year.
• Proper Installation: Ensure that your roof is installed by experienced professionals. Proper installation can help minimize granule loss and extend the lifespan of your shingles.
• Choose Quality Shingles: Investing in high-quality shingles can make a significant difference. Look for shingles that are designed to be durable and resistant to granule loss.
• Minimize Foot Traffic: Reduce the amount of foot traffic on your roof. When access is necessary, use proper footwear and follow safety guidelines to minimize damage.
• Clean Your Gutters: Keeping your gutters clean can help prevent water buildup, which can accelerate granule loss. Ensure that water flows freely through the gutters and away from your roof.

Repairing Granule Loss

When you’re dealing with damage to your asphalt shingle roof, it’s always best to consult a roofing professional, to help with:

• Patching Bald Spots: For minor granule loss, you may be able to patch bald spots with roofing cement or adhesive. This can provide temporary protection until you’re able to replace the affected shingles.
• Replacing Damaged Shingles: If granule loss is more extensive, it may be necessary to replace the damaged shingles. This can help prevent further damage and extend the lifespan of your roof.
• Adding a Protective Coating: In some cases, applying a protective coating to your shingles can help reduce granule loss. This coating can provide an additional layer of protection against UV rays and weather conditions.

When to Consider Roof Replacement

Occasionally, granular loss can’t be repaired, and it is better to replace your roofing materials. Look for the following signs:

• Age of the Roof: If your roof is nearing the end of its expected lifespan (typically 20-30 years for asphalt shingles), it may be more cost-effective to replace the entire roof rather than constantly repairing granule loss.
• Extensive Granule Loss: If granule loss is widespread and affecting a large portion of your roof, it’s likely time for a replacement. Continuing to patch and repair may only provide temporary relief.
• Frequent Leaks: If you’re experiencing frequent leaks due to granule loss, replacing the roof can provide a more permanent solution and prevent further water damage to your home.
• Decreased Curb Appeal: If your roof’s appearance is significantly compromised due to granule loss, replacing it can enhance your home’s curb appeal and potentially increase its value.

Your Go-To Roofing Team

Granule loss on shingles is a common issue that homeowners should be aware of. While some granule loss is normal, excessive loss can lead to more serious problems like leaks, reduced roof lifespan, and increased energy bills.

If you need professional assistance with your roof, consider reaching out to our team at Built Right Roofing & Construction. We can provide expert guidance and services to ensure your roof remains in excellent condition.