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Understanding Advancements in Roofing Granule Technology

The product design process at Malarkey Roofing Products considers many aspects of a product’s performance, construction, life cycle, and components. Granules are an integral part of a roofing shingle. Not only does their asphalt adhesion help keep shingle colors vibrant, but granules can also be engineered to perform and protect in certain climates.

In the above video, 3M Industrial Minerals and Products Division, Senior Laboratory Manger, Frank Klink, Ph.D., explains the urban heat island effect and how Malarkey Ecoasis™ shingles with cool roofing granules reflect solar UV rays. The granules are manufactured to reflect the UV, or infrared, portion of sunlight. This enables the colors of the shingle to be seen by the naked eye, while still allowing the roof to stay cool.

“If you were to actually feel a cool roofing granule surface versus a non-cool surface,” says Klink, “you’d probably see 20 degrees [Fahrenheit] or more temperature difference on that surface in the middle of a hot afternoon.”

In addition to engineering the granules for solar reflective performance, the 3M Scotchgard™ Protector granules have been developed to resist the growth of algae and prevent black streaks from forming on roofs in climate with high humidity. In 1994, Malarkey Roofing Products became the first shingle manufacturer to use 3M Scotchgard™ Protector granules. Learn more about the history and scientific development of these granules in this video featuring Randy Morgan, National Accounts Manager, 3M Industrial Mineral and Products Division.