The Appalachian Materials Region of CRH Americas Materials is an industry-leading aggregate, concrete, and asphalt paving provider and operates in the states of Indiana, Kentucky, Virginia, and West Virginia. CRH Americas – the largest supplier of building materials and products in North America, operating in 46 states, and six Canadian provinces, employing 41,000 employees. This app is an all-in-one resource to communicate company information, benefits, and quick access to industry social media pages.