| Business | Phone |
| Academy Door & Control Corp Rockville 20850 | (301) 762-7226 |
| Aero Garage Door Inc Rockville 20850 | (301) 738-3870 |
| Beltway Garage Door Montrose Rd, Rockville 20852 | (301) 299-5028 |
| Clozermatic Door 601 Dover Rd # 11, Rockville 20850 | (301) 869-9560 |
| Clozermatic Engineering Co 14672 Southlawn Ln # D, Rockville 20850 | (301) 942-0096 |
| Precision Overhead Garage Door Rockville 20850 | (301) 309-8892 |
| Door Systems Inc Rockville 20852 | (301) 921-8355 |
| Available Garage Doors 11821 Parklawn Dr Ste 125, Rockville 20852 | (301) 660-3752 |