What lies below
is what lies ahead

With over 90 years of superior service, Specialty Granules (SGI) is a leading aggregates and mining company supplying specialized products to the North American building materials industry. Headquartered in Hagerstown, Maryland, SGI has four production plants strategically located across the U.S. SGI is committed to serving its customers’ needs with industry-leading R&D, innovative products and high-touch service.

SGI is the market-leading providing of roofing granules in the United States

Our Leadership Team

Justin Dunlap
SVP, President
Matthew McClure
Senior Director, Operations
Daniel Rardon
Director of R&D
Robert Toth
Director of Sales & Logistics
Timothy Dull
Director of Human Resources
Tom Zaremba
Director of Business Development
Paul Fink
Director of Business Development Agriculture