GRB Roofing - A Division of Golden Ratio LLC • Address: 2506 Appleton Ln, Bowie MD 20716 • Phone: (443) 699-6192 • Website: • Email: [email protected] • Golden Ratio Builders is now the most trusted name in roofing installation, repair and service. Golden Ratio Builders - Roofing Division prides itself on providing a fair price for top quality installation and repairs. Now servicing the Bowie, Crofton and all across Maryland. United States