National Glass Association

Founded in 1948, the National Glass Association is the largest trade association representing the flat (architectural) and auto glass industries. Based outside Washington, DC, and representing more than 3,000 member companies and locations, NGA offers certification, education and training, including – a state-of-the-art online training resource. NGA publishes the industry’s leading trade magazines: Glass Magazine® and Window & Door®; and e-newsletters: e-glass weekly™, WDweekly™, and For Technicians Only™ e-bulletin. In addition, NGA serves the industry and general public with its Web sites:,,,, and NGA also hosts the industry’s premier annual trade event: GlassBuild America®: The Glass, Window & Door Expo. For more information on NGA, visit

Glass Association of North America

Based in Topeka, KS, the Glass Association of North America (GANA) is made up of seven divisions: Building Envelope Contractors, Decorative, Flat Glass Manufacturing, Insulating, Laminating, Mirror and Tempering. GANA offers a wide variety of publications for the flat glass industry, including the GANA Glazing Manual, Laminated Glazing Reference Manual and the Project Managers Reference Manual. Additionally, GANA sponsors the annual Building Envelope Contractors (BEC) Conference, as well as Glass Week, and provides a series of educational seminars and programs. For more information on GANA, visit

American Architectural Manufacturers Association

Based in Schaumburg, IL, the American Architectural Manufacturers Association (AAMA) is the leading trade association for the North American fenestration industry. AAMA's member companies include manufacturers and suppliers of windows, doors, skylights, curtain wall, storefronts and related materials and components for the residential and commercial markets. Focusing on both technical and marketing services, AAMA's activities include standards development, product certification, market research and educational programs for the fenestration industry. For more information on AAMA, visit

Insulating Glass Manufacturers Alliance

Based both in the United States and Canada, the Insulating Glass Manufacturers Alliance is a North American association of insulating glass manufacturers, suppliers of component materials, and other industry-related professionals. IGMA is dedicated to upgrading product performance by promoting awareness of technological developments in the industry through educational events, technical publications and certification. For more information on IGMA, visit

Bath Enclosure Manufacturers Association

The Bath Enclosure Manufacturers Association is a collaborative, international glass and glazing industry organization committed to the advancement of the manufacture, promotion, sale and safe installation of tub and shower enclosures. Based in Topeka, KS, BEMA was founded in 1992 and represents industry manufacturers, suppliers and dealers with a focus on consumer awareness. For more information on BEMA, visit