NAICS 332321: Metal Window and Door Manufacturing

NAICS 332321 – Metal Window and Door Manufacturing encompasses the fabrication and installation of metal-framed windows, doors, and related architectural hardware for commercial, institutional, and federal facilities. This sector includes the production of steel, aluminum, and other metallic fenestration systems designed to meet stringent building codes, energy efficiency standards, and security requirements. Products in this category are integral to new construction and renovation projects requiring durable, fire-rated, or blast-resistant assemblies, particularly in high-security or mission-critical environments. In government contracting, this NAICS supports infrastructure modernization, facility upgrades, and compliance with federal sustainability and accessibility mandates, positioning it as a specialized niche within the broader building materials supply chain. Top contractors in this sector include PHOENIX GENERAL CONTRACTORS, LLC and DAP CONSTRUCTION MANAGEMENT LLC, both of which operate as mid-sized primes with expertise in integrated building envelope solutions. These firms typically manage end-to-end procurement, fabrication, and installation of metal fenestration systems, often subcontracting specialized manufacturing components while maintaining direct contract responsibility with federal agencies. The Department of Homeland Security and the Department of Veterans Affairs are the primary federal buyers, driving demand through facility security enhancements, VA hospital modernizations, and border infrastructure projects. These agencies prioritize products that meet ASTM, NFPA, and ICC building performance standards, particularly for entry control points, secure housing units, and high-traffic public areas. The competitive landscape is characterized by a concentration of specialized manufacturers and contractors with certified fabrication capabilities and experience in federal compliance regimes. Opportunities exist for firms with established supply chains, quality control certifications, and familiarity with GSA schedules and FAR requirements. Demand is increasingly tied to resilience-focused construction initiatives and retrofit programs aimed at improving energy performance and physical security across federal real property portfolios.