1. Columbia Roofing Inc 6363 S Hanover Rd, Elkridge, MD 21075 Coordinate: 39.19595,-76.72922 Phone: (410) 379-6100
2. Maryland Shingle 6326 Ducketts Ln, Elkridge, MD 21075 Coordinate: 39.20087,-76.74871 Phone: (410) 730-8800