NIGP 91431: Composites

NIGP 91431 Composites is an Item code covering composite materials and assemblies that state and local governments procure for facility maintenance, infrastructure repair, and specialized construction applications. Recent state and local solicitations reveal that this code captures activity in roofing systems (TPO single-ply membranes), structural repair materials (epoxy-based cover plates for steel pilings, fiberglass-reinforced piping), HVAC equipment housings and ductwork, and interior finishes including gypsum board assemblies and acoustic ceiling systems used in campus renovations and institutional facility upgrades.

Washington State agencies and community colleges dominate recent activity under this code. The Washington State Department of Enterprise Services (DES), working on behalf of the Department of Corrections, Department of Social and Health Services, and multiple public higher-education institutions, has issued the bulk of recent solicitations. State-level buyers include the Washington Department of Corrections (roof replacement at the Washington Corrections Center for Women, 64,384 square feet of TPO roofing, ITB due June 9, 2026), the Department of Social and Health Services (facility renovations with composite interior finishes at multiple campuses), and the Department of Labor and Industries. Community college systems—including Skagit Valley College, Bellevue College, Tacoma Community College, Walla Walla Community College, Spokane Falls Community College, Yakima Valley College, and Highline College—are repeat procurers of composite-heavy renovation work. Activity clusters in Washington State, with notable secondary opportunities in Georgia (DeKalb County's tennis center reconstruction, ITB 2026-076-ITB due July 13, 2026, including IT and low-voltage infrastructure systems). Representative recent work includes Bellevue College's replacement of five water source heat pumps (sealed bid, DES procurement, due June 16, 2026, estimated $325,000–$360,000) and the Lower Columbia College renovation spanning five buildings with fiber cement siding, EPDM roofing, gypsum board finishes, and mechanical systems (sealed bid, DES procurement, due June 23, 2026, estimated $1.2–$1.4 million). Prevailing wage, apprenticeship utilization targets of 15 percent, and voluntary diverse business goals (10 percent MBE, 6 percent WBE, 5 percent SBE/PWSBE, 5 percent veteran) are standard across Washington public works contracts in this space.