Eagle Materials Inc. is a supplier of construction products, building materials and materials used for oil and natural gas extraction. The Company operates through five segments: Cement, Concrete and Aggregates, Gypsum Wallboard, Recycled Paperboard, and Oil and Gas Proppants. The Company's construction products are used in residential, commercial and infrastructure construction, and include cement, slag, concrete and aggregates. Its basic materials used for oil and natural gas extraction include frac sand and oil well cement. It sells cement in various regional markets, including Texas, Illinois, the central plains, Michigan, Iowa, the Rocky Mountains, northern Nevada, southern Ohio and northern California. It sells slag in the greater Chicago, Illinois area. It also operates a recycled paperboard business, which sells internally to its wallboard business, as well as to external customers. It sells oil well cement and frac sand to shale deposit zones across the United States.