Headwaters Incorporated is a building materials company operating in the building products and construction materials sectors. The Company sells building products, such as manufactured architectural stone, siding accessory products, roof products and concrete block. The Company's operating segments include building products, construction materials and energy technology. It also markets coal combustion products (CCPs), including fly ash, which is used as a partial replacement for Portland cement in concrete. The Building Products segment is engaged in designing, manufacturing and marketing of siding accessories used in residential repair and remodeling, and new residential construction applications. The Materials segment markets fly ash in the construction materials sector. The Energy Technology segment is involved in heavy oil upgrading processes through the sale of its HCAT catalyst material. It sells catalytic materials to certain refineries engaged in heavy oil upgrading.