08 40 00 - Entrances, Storefronts, and Curtain Walls - EFCO Corporation is a leading manufacturer of architectural aluminum window, curtain wall, storefront and entrance systems for commercial architectural applications. Headquartered in Monett, Missouri, our vertically integrated manufacturing process and 1600 skilled employees ensure quality at every step. We focus on providing innovative customer solutions to design challenges while adhering to budgets and other project concerns. Our background includes everything from historical replication to cutting-edge new construction. We are dedicated to supporting the building community with products, services, and programs that promote outstanding commercial design.