Specialty Granules Inc.

MiningMaryland, United States501-1000 Employees

Specialty Granules LLC has been a leader and innovator in aggregates and mining for over 100 years, manufacturing specialized products for the roofing, construction, and agricultural industries. 

SGI is headquartered in Hagerstown, MD, and has six plants strategically located across the U.S. Plants in Blue Ridge Summit, PA; Annapolis, MO; Pembine, WI; Trona, CA; and Ione, CA, are open-pit quarries, mining rock that is crushed and screened to produce granules and aggregates. 

Granules are colored with ceramic pigments and utilized as colored roofing granules or left uncolored and used on the unexposed portion of shingles. These granules are then sold to roofing manufacturers in the U.S. to help protect millions of North-American homes each year. 

Rocks unable to be used for granules are instead utilized in the aggregates market to help protect roads and provide a safeguard against erosion.

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