Which option best describes granules as used on asphalt roofing products?

• A. A decorative ceramic coating for the underside of shingles.
• B. A mineral additive used for 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 protective top layer of asphalt shingles. They are ceramic-coated, colored crushed rock that is embedded in the exposed surface of the shingle, not on the underside. This granule coating gives shingles their color and provides critical protection: it shields the asphalt from UV sun, weathering, and temperature changes, helps resist hail and abrasion, and contributes to overall durability and fire resistance. The other options don’t fit because granules sit on the exposed surface as a protective coating, not as a decorative coating on the underside, not as a cement additive, and not as a sealant for seams.