Asphalt shingles are the most popular roofing material in the United States due to their durability, affordability, and ease of installation. They are made up of a base mat, asphalt coating, and a layer of granules. These granules play a critical role in protecting the shingle from the elements and extending its lifespan. In this blog post, we will discuss what granules are, why they are important, and what happens when they wear off.
What are Granules?
Granules are small, sand-like particles that are embedded into the surface of asphalt shingles. They are made of various materials, such as ceramic, rock, or slag, and are available in a wide range of colors to match the aesthetic of the home. The granules are applied to the shingle surface during the manufacturing process and serve several important functions.
Why are Granules Important?
Granules protect the shingle from the harmful effects of the sun, wind, rain, and hail. They act as a shield against ultraviolet radiation, which can cause the asphalt to deteriorate and the shingle to lose its flexibility. Granules also protect the shingle from hail and wind-blown debris, which can cause significant damage to the roof. In addition, granules provide fire resistance to the shingle, making it less likely to catch fire.
What Happens When Granules Wear Off?
Over time, the granules on asphalt shingles will start to wear off due to exposure to the elements. When this happens, the shingle becomes more vulnerable to damage from the sun, wind, rain, and hail. The asphalt coating will start to deteriorate, and the shingle will lose its flexibility, making it more prone to cracking and breaking. Without the protective layer of granules, the shingle may also become more susceptible to fires.
In addition to the structural issues that arise from granule loss, the appearance of the roof will also be affected. As the granules wear off, the color of the shingle will begin to fade, and the roof may take on a patchy or uneven appearance. This can lower the curb appeal of the home and reduce its resale value.
Conclusion
Granules are an essential component of asphalt shingles. They provide protection against the elements, improve fire resistance, and enhance the appearance of the roof. It is important to choose high-quality shingles with durable granules to ensure the longevity and reliability of the roof. If you notice granule loss or other issues with your roof, it is best to consult with a roofing professional to assess the damage and determine the best course of action.