eagle materials inc. (nyse: exp) is a leading u.s. manufacturer and distributor of building materials including gypsum wallboard, portland cement, recycled paperboard, and concrete and aggregates. the construction industry uses our products to build and renovate america’s residential, commercial and industrial structures and to build and improve our country's public infrastructure. founded in 1964, we are the nation’s fifth largest wallboard producer and twelfth largest cement manufacturer.