| Business | Phone |
| Air Seal Insulation 825 Garland St, Columbia 29201 | (803) 461-6074 |
| Cotton Tails Insulators 7033 Sprott St, Columbia 29223 | (803) 714-6200 |
| G-T-G Insulation Inc 112 Sunbelt Blvd, Columbia 29203 | (803) 754-6992 |
| Gloria & Stanley Co 1402 Argent Ct, Columbia 29203 | (803) 754-8490 |
| Performance Contracting Inc 145 Windhill Rd # 400, Columbia 29203 | (803) 333-0245 |
| Unitherm Inc 6904 Main St # 106, Columbia 29203 | (803) 786-0089 |