Roofs, often unnoticed yet vital protectors of our homes, face various challenges, one of which is the loss of granules from new asphalt shingles. This article delves into the causes, implications, and management of this phenomenon, providing homeowners with crucial insights.
The Role of Granules in Asphalt Shingles
Granules are not merely decorative elements; they play several critical roles in the functionality of asphalt shingles:
- UV Protection: They shield the shingle’s bitumen layer from the sun’s UV rays, preventing degradation.
- Fire Resistance Enhancement: The granules contribute to the shingles’ ability to resist fire.
- Aesthetic Value: They provide the desired color and texture to the shingles.
- Algae and Fungus Resistance: Some granules are treated to inhibit the growth of algae and fungus, preserving the roof’s appearance and integrity.
Causes of Granule Loss in New Roofs
During Manufacturing
In the production of asphalt shingles, an excess of granules is applied to ensure complete coverage. However, not all these granules adhere firmly, leading to initial shedding post-installation.
During Transportation and Handling
The movement and handling of shingle packages can dislodge some granules. This loss becomes evident during and immediately after the roof installation.
Environmental Factors
Exposure to rain, wind, and even foot traffic can contribute to the loss of these excess granules, particularly in the initial period following installation.
When to Be Concerned About Granule Loss
While some granule loss is expected in new roofs, ongoing or excessive loss can signal deeper issues:
- Bare Spots: Areas on shingles lacking granules are a red flag.
- Granules in Gut