Armstrong World Industries Inc specializes in creating ceiling and wall solutions, offering a wide range of products including mineral fiber, fiberglass wool, metal, and wood ceilings, as well as innovative architectural specialties. With a focus on both commercial and residential markets, they provide materials for new constructions and renovations. Their offerings extend to ceiling perimeters, trims, and grid products for drywall systems. Founded in 1860 and based in Lancaster, Pennsylvania, Armstrong is a key player in the construction industry, distributing products through various channels including wholesalers and large home centers.