Howlin Concrete is a provider of sand, washed gravel, bluestone and ready-mixed concrete. The company also sells precast septic tanks and related accessories. The company is a subsidiary of Edward B. Howlin. Founded in 1965, Edward B. Howlin operates through several core businesses, including Howlin Concrete, Dunkirk Supply and Howlin Realty Management. Dunkirk Supply maintains home centers in Dunkirk, Lusby and Leonardtown. The home centers offer building products that range from framing lumber and connection hardware to contractor-grade windows and doors and custom windows. It also offers a crane division that supports construction projects and a truss plant that designs and manufactures pre-engineered roof and floor trusses. Howlin Realty Management provides rental services for commercial and residential properties. Howlin Concrete is located in Owings, Md.