| # | Company name | Role | # of Projects |
|---|---|---|---|
| 1 | AEP bvba | roofing supplier | 1 |
| 2 | AEP-Span | roofing supplier | 0 |
| 3 | Aislamientos Zubi S.L. | roofing supplier | 1 |
| 4 | Alliance Forming Ltd. | roofing supplier | 1 |
| 5 | AltUSA (Clay Forever, LLC) | roofing supplier | 1 |
| 6 | Alwitra Flachdachsysteme GmbH & Co. | roofing supplier | 0 |
| 7 | American Hydrotech, Inc. | roofing supplier | 1 |
| 8 | AMF do Brasil Ltda | roofing supplier | 0 |
| 9 | Architectural Building Components | roofing supplier | 1 |
| 10 | Atlas Roofing Corp. | roofing supplier | 0 |
| 11 | Benjamin Maintenance Corporation | roofing supplier | 2 |
| 12 | Bennett & Brosseau Roofing, Inc. | roofing supplier | 28 |
| 13 | Birdair, Inc. | roofing supplier | 9 |
| 14 | Bjerselius Takisolering AB | roofing supplier | 2 |
| 15 | Bothwell-Accurate | roofing supplier | 1 |
| 16 | BriggsAmasco | roofing supplier | 1 |
| 17 | Briggs Roofing & Cladding Ltd. | roofing supplier | 1 |
| 18 | Bright Star Construction Materials L.L.C. | roofing supplier | 0 |
| 19 | Carolina Roofing | roofing supplier | 1 |
| 20 | CENO TEC GmbH | roofing supplier | 5 |