Trade-Specific Associations for Subcontractors
Trade Associations •
National Glass Association (NGA)
National Glass Association (NGA)
The National Glass Association is the largest trade association serving the glass industry. Its member community represents 1,800+ contract glaziers, full-service glass companies, fabricators, manufacturers, and suppliers. NGA champions the benefits of glazing and glass building products and is a reliable industry resource for its members.

Trusted by trade contractors across the country












- 70+ online training and glazier apprenticeship courses
- 300+ technical and advocacy resources on core industry topics
- An array of industry conferences including GlassBuild America, Building Envelope Contractors Conference, NSA Glass Conference, and more.
- A steady stream of industry news, information, and insights
- Access to a member directory to connect with peers across the industry
Trade-Specific Associations for Subcontractors
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Other trade associations
American Subcontractors Association (ASA)
The American Subcontractors Association promotes the rights and interests of subcontractors, specialty contractors, and suppliers through education, advocacy, networking, and professional growth. Membership is open to anyone who provides subcontract labor and/or materials to the construction industry.
Sheet Metal and Air Conditioning Contractors' National Association (SMACNA)
The Sheet Metal and Air Conditioning Contractors’ National Association has more than 100 chapters and 3,500 members across the US, Canada, Australia, and Brazil. Its mission is to create a competitive advantage for sheet metal and air conditioning contractors through education, labor relations, standards development, industry representation, and business studies.
American Institute of Constructors (AIC)
The American Institute of Constructors is a network of construction professionals dedicated to building excellence and high ethical standards across construction-related fields. They offer certifications, membership, and connections to their directory of architectural and engineering partners.