Eagle Materials Inc was incorporated in 1936 in Delaware. The Company manufactures and distributes building products used in residential, industrial, commercial, and infrastructure construction in the United States. The Company operates in five segments namely Cement, Concrete and Aggregates, Gypsum Wallboard, Recycled Paperboard and Oil and Gas Proppants. These operations are conducted in the U.S. and include the mining of limestone and the manufacture, production, distribution and sale of portland cement (a basic construction material which is the essential binding ingredient in concrete), the mining of gypsum and the manufacture and sale of gypsum wallboard, the manufacture and sale of recycled paperboard to the gypsum wallboard industry and other paperboard converters, the sale of readymix concrete and the mining and sale of aggregates (crushed stone, sand and gravel) and sand used in hydraulic fracturing. Its construction productions are used in residential, industrial, commercial and infrastructure construction and include cement, concrete and aggregates. Its building materials are sold into similar markets and include gypsum wallboard. Its basic materials used for oil and natural gas extraction include frac sand and oil well cement. The principal raw materials are recycled paper fiber (recovered waste paper), water and specialty paper chemicals. It sells gypsum wallboard to numerous building materials dealers, gypsum wallboard specialty distributors, lumber yards, home center chains and other customers located throughout the United States.