| Business | Phone |
| Aero Roofing Inc Columbia 21044 | (410) 730-2775 |
| Citi Roofs Corp 9510 Berger Rd # 200, Columbia 21046 | (410) 381-3100 |
| Economic Roofing Corp 6640 Oakland Mills Rd, Columbia 21045 | (410) 720-5306 |
| Gts Roofing Columbia 21044 | (410) 730-2277 |
| Kelbie Roofing & Waterproofing Columbia 21044 | (410) 730-9097 |