Granules on new shingles that are interlocked with embedded granules, but not embedded themselves, are known as what?

Granules on new shingles that are interlocked with embedded granules but are not embedded themselves are referred to as "hitchhikers." This term describes the loose granules that sit on the surface and become interlocked with granules that are securely embedded into the asphalt of the shingle. This feature can enhance the shingle's overall durability and performance by providing an extra layer of granules that can help improve its aesthetic appeal and resistance to weather elements.

Other terms like "granule locks," "surface bonds," or "adhesive layers" do not accurately describe this specific characteristic. Granule locks typically refer to the bonding created by granules that are set into the shingle, ensuring they remain adhered over time. Surface bonds might suggest a similar idea, but they do not capture the interlocking nature described. Adhesive layers usually pertain to the material used in the shingle manufacturing process that helps maintain layers together but do not refer to the granule arrangement. Understanding these distinctions is crucial for interpreting product descriptions and assessing the quality and characteristics of roofing materials.