Our Suppliers

At Firestone Building Products we’re all about making your job easier—being the company you can count on for every building performance solution you’re looking for, from roots to rooftops.

GenFlex is a leader in new roofing products and technologies for the past 30 years. GenFlex has a long tradition of standing behind its products and supporting its customers.

Carlisle SynTec Systems has been the leader in the commercial single-ply roofing industry for more than 50 years. It continues to lead the roofing industry today by providing its customers with superior roofing systems and services through a select network of manufacturer’s representatives, distributors and applicators. Carlisle’s products have been installed on a wide range of buildings around the world, including schools, hospitals, warehouses, and cold storage facilities. With more than 19 billion square feet of roofing materials sold, Carlisle continues to lead the industry by providing its valued customers with the best products, services, and warranty options available today.

Versico, a division of Carlisle Construction Materials, LLC, was formed in 1993 after the acquisition of Goodyear’s roofing business. Now, more than twenty years later, Versico has positioned itself as one of the top single-ply roofing system manufacturers in the United States by focusing its efforts on quality products and exceptional service. Versico has been instrumental in the development of today’s leading technologies in the commercial roofing industry.

Founded in 1886, GAF has become North America’s largest manufacturer of commercial and residential roofing.

ABC Supply Co., Inc. is the largest wholesale distributor of roofing in the United States and one of the nation’s largest distributors of siding, windows and other select exterior and interior building products, tools and related supplies

At Roof Depot our goal is to provide the extra measure of service and convenience by stocking what you need, where and when you need it. We are one of the largest distributors of roofing shingles, commercial roofing, metal roofing, slate roofing, tile roofing, vinyl siding, windows and skylights.

METAL DESIGN SYSTEMS, INC. is one of the leading aluminum composite fabricators located in the Midwest of the United States. MDSI works directly with architects, general contractors, owners, and installers to produce ACM and MCM wall panel systems, column covers, canopies, custom architectural / branding components and cornices

SRS Distribution is the largest network of independent distributor brands in the U.S. Each independent brand operates regional branches that are bound by a culture that focuses on customer relationships and service; efficiency through innovation; as well as a passion to enrich every customer and their business. We invite you to learn more about us and the culture that sets us apart.


Gannon Roofing Supply was founded in 1979 by roofing professionals to offer better products and services to the roofing industry in central Iowa. Since our founding, Gannon has expanded to three locations in Des Moines, Cedar Rapids, and the Quad Cities. These three locations have enabled us to expand our service area to include all of Iowa. Our desire to be the best in the industry has served as a catalyst for the many services we provide today.

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