What is Granule Loss in Asphalt Shingle? Your Boston Roofer 

What is Granule Loss in Asphalt Shingle? Your Boston Roofer What is Granule Loss in Asphalt Shingle? Your Boston Roofer In Massachusetts

Asphalt shingles are a popular choice for roofing material due to their durability, affordability, and versatility. However, these shingles may experience
granule loss over time, which can lead to premature aging and deterioration of the roof. In this article, we’ll discuss the causes and consequences of granule loss in asphalt shingles. 


What is Granule Loss in Asphalt Shingles? 

The granules on the surface of asphalt shingles serve multiple purposes, including protecting the shingle from UV rays, providing fire resistance, and giving the shingle its color. Granule loss occurs when the granules on the surface of asphalt shingles become loose or fall off. This can leave the shingle exposed to the elements, leading to premature aging and deterioration.


Causes of Granule Loss in Asphalt Shingles

Age Asphalt shingles become more susceptible to granule loss as they age. It happens because the shingle’s surface becomes rougher and more porous, allowing granules to dislodge more easily. Additionally, the natural degradation of the asphalt reduces the shingle’s ability to retain the granules, leading to further granule loss.

Weathering Exposure to extreme weather conditions, such as heat, cold, wind, and rain, can cause granule loss over time. The reason is that harsh weather eventually breaks down the protective layers of the shingles. Furthermore, the repeated and accumulated effects cause the shingle’s surface to become more vulnerable, which leads granule loss.

Poor Quality Low-quality shingles can experience granule loss due to insufficient granules. Also, inferior bonding agents can loosen and cause the granules to fall off. As a result, the shingles may not provide adequate protection and may have a shorter lifespan.

Improper Installation Incorrect installation of shingles may make them more prone to granule loss. These mistakes expose shingles to unnecessary wear and tear, which can cause the granules to detach prematurely. Additionally, improper installation can lead to water damage, further accelerating granule loss due to the shingles’ weakened state.


Consequences of Granule Loss in Asphalt Shingles

Leaks and Water Damage Granule loss can leave the shingle surface exposed to the elements, resulting in a weakened protective barrier. This can lead to leaks and water damage to the underlying structure, particularly during heavy rainfall or snowfall. If left unaddressed, water damage can cause significant structural issues and compromise the integrity of the building. 

Premature Aging and Deterioration Premature aging and deterioration can occur when granule loss exposes the asphalt shingle surface to the elements. The shingles may become more susceptible to damage from UV radiation, extreme weather conditions, and other environmental factors. Additionally, the loss of granules can affect the shingles’ ability to reflect heat, causing the building to absorb more heat and resulting in higher energy costs. 


Guide for Homeowners to Inspect the Granule Loss

Regular inspections for granule loss are essential to maintain its condition and prevent further damage. The first step is to check the end of your downspouts for the presence of granules. If you find granules, it may indicate that granule loss is occurring on your roof. Another area to inspect is your gutters. Check for granules in the gutters and downspouts and look for areas where granules have accumulated. Excessive granule loss may be present if you find a significant amount of granules. Early detection of granule loss is important, as it allows you to address the issue promptly and prevent further damage to your roof. By maintaining your roof, you can protect your home from the elements and enhance its overall appearance and value.


Addressing Granule Loss in Asphalt Shingles

Professional Inspection If someone notices granule loss in their roof, they should consult a professional roofing contractor to inspect the roof and determine the underlying cause of the problem. 

Repair or Replacement A simple repair or replacement of a few shingles may fix the problem in some cases, but if granule loss is extensive, it may be time to consider a full roof replacement.

Prevention and Maintenance Regular roof maintenance and inspections by a professional can help identify issues before they become more serious problems. Additionally, choosing high-quality shingles and ensuring proper installation can help prevent granule loss and prolong the life of a roof.



Granule loss in asphalt shingles can have serious consequences, including leaks, water damage, and premature aging. Homeowners can help prolong the life of their roof and avoid costly repairs or replacements by understanding the causes of granule loss and taking steps to prevent it. If granule loss is noticed, it is important to promptly consult a professional roofing contractor to address the problem.