Armstrong World Industries, Inc. designs, manufactures, and sells ceiling and wall solutions in the Americas through its Mineral Fiber and Architectural Specialties segments. Its products include mineral fiber, fiberglass, metal, wood, felt, architectural resin and glass, wood fiber, and glass-reinforced gypsum, as well as ceiling components such as perimeters, trims, and grid products for drywall ceiling systems. The company also designs, produces, and sources specialty ceilings, walls, and other interior and exterior architectural applications, primarily for commercial settings, and manufactures ceiling suspension system (grid) products. It serves commercial and residential construction markets and the renovation of existing buildings, selling to resale distributors, ceiling system contractors, wholesalers, and retailers including large home centers. Founded in 1860, Armstrong World Industries is headquartered in Lancaster, Pennsylvania.