| Business | Phone |
| Advanced Insulation Technology 3322 Lousma Dr Se 504, Grand Rapids 49548 | (616) 241-6227 |
| Bazuin Insulating Co 3761 Linden Ave Se A, Grand Rapids 49548 | (616) 475-4255 |
| G & K Insulating O-496 Lake Michigan Dr Nw, Grand Rapids 49534 | (616) 453-0282 |
| Grand Eagle Insulation Inc 15 N Park St Nw, Grand Rapids 49544 | (616) 364-9184 |
| Insulation & Environmental Svc 3156 3 Mile Rd Nw, Grand Rapids 49534 | (616) 453-8030 |
| Whitson Insulation Co 4287 Brockton Dr Se, Grand Rapids 49512 | (616) 698-0490 |
| Landman Insulation Co 818 Boston St Se, Grand Rapids 49507 | (616) 243-1419 |
| Vander Laan Home Improvements Grand Rapids 49508 | (616) 455-5461 |
| Szudera Insulation Inc 2695 Wildridge Ct Ne, Grand Rapids 49525 | (616) 361-1347 |
| Marvin Veldheer & Sons Insltng 1100 Kinney Ave Sw, Grand Rapids 49534 | (616) 453-8384 |