Eagle Materials Inc., through its subsidiaries, produces and supplies heavy construction materials and light building materials in the United States. It operates through Cement, Concrete and Aggregates, Gypsum Wallboard, and Recycled Paperboard segments. The company engages in the mining of limestone for the manufacture, production, distribution, and sale of Portland cement; grinding and sale of slag; and mining of gypsum for the manufacture and sale of gypsum wallboards used to finish the interior walls and ceilings in residential, commercial, and industrial structures.