Granules on asphalt roofing products are best described as which of the following?

• A. A decorative ceramic coating for the underside of shingles.
• B. A mineral additive used in cement.
• C. A type of sealant applied to roof seams.
• D. Ceramic-coated, colored crushed rock that is applied to the exposed surface of asphalt roofing products.

Answer: (D)

Granules are the ceramic-coated, colored crushed rock that sits on the exposed surface of asphalt shingles. They act as a protective outer layer, shielding the asphalt from UV rays, weathering, and damage while also giving the shingles their color and texture. They also contribute to fire resistance and durability of the roof surface. They aren’t a coating for the underside, a cement additive, or a sealant for seams, which is why those options don’t fit. Over time, granules can wear off or be knocked loose, reducing UV protection and exposing more of the asphalt.