Specialty Granules

Address: Hagerstown, Maryland
Phone: 301-393-8872
Fax: 301-733-4003

SGI’s Technical Center is located in Hagerstown, Maryland. In 2016, the central R&D laboratory was renovated to provide a state of the art facility dedicated specifically to mineral roofing and aggregate materials. SGI is positioned to be flexible and responsive to customers’ development and testing needs, and the Technical Center provides a confidential venue for customers to evaluate product and design changes to advance their own product designs prior to full scale manufacturing ramp-up. Key facilities include:

  • Fully-staffed R&D, testing, and design laboratories
  • Granule pilot coloring and crushing facility
  • Customer design center

SGI’s Technical Center serves all of its manufacturing locations’ technical and quality-testing needs. SGI monitors daily baserock feeds at each plant to ensure they meet demanding specifications for performance, durability, and environmental impact. In addition, every production run of colored granule product is included in SGI’s extensive weathering program and tested to ensure quality specifications are met.