Manufacturers of Roofing Granules
Superior Service
Product Excellence
Natural Footprint

Welcome to Specialty Granules Inc.

For over 90 years, Specialty Granules, Inc. (formerly ISP Minerals) has supplied high quality granules to the North American Roofing Industry. Our employees, vendors, and communities in which we operate have been critical to our success. We look forward to working beside you in the future.

Learn More About SGI


Our commitment to service is based on an in-depth understanding of customers’ needs and our ability to quickly translate that knowledge into new or improved products. Learn more about our company, its history, our technical center, and our logistics department.

Learn more about our plants


While we’re headquartered in northwestern Maryland, we have four productions plants¬†ideally situated nation-wide to meet your every need. Find out more.

Learn more about our products


Asphalt based roofing products today are designed to last 30, 40, even 50 years. This would not be possible without mineral roofing granules. Our colored granules are an asphalt roofing system’s first line of defense from the environment. Learn more.