| # | Company name | Role | # of projects |
|---|---|---|---|
| 1 | J & B Installations Inc | Roof installation | 1 |
| 2 | J & B Installations Inc | Roof installation | 1 |
| 3 | J & J Maintenance & Construction | Roof installation | 1 |
| 4 | J & J Roofing Co. | Roof installation | 0 |
| 5 | J & L Rfg Co Inc | Roof installation | 0 |
| 6 | J & R Co-op Construction Co. | Roof installation | 1 |
| 7 | J Bishop Builders Inc | Roof installation | 1 |
| 8 | J Messina Roofing | Roof installation | 1 |
| 9 | J P Patti Company. Inc. | Roof installation | 0 |
| 10 | J W Butzen Roofing | Roof installation | 1 |
| 11 | J. Stevens Construction Inc. | Roof installation | 0 |
| 12 | Jackson Construction Service | Roof installation | 1 |
| 13 | James Construction Company | Roof installation | 1 |
| 14 | James Guest Roofing | Roof installation | 0 |
| 15 | James Mansfield & Sons Company Inc | Roof installation | 0 |
| 16 | James Samuel Roofing | Roof installation | 5 |
| 17 | Jameson Roofing Company | Roof installation | 0 |
| 18 | Jamestown Roofing Co | Roof installation | 0 |
| 19 | Jay Roofing | Roof installation | 0 |
| 20 | Jim Giese Commercial Roofing Inc | Roof installation | 0 |