| # | Company name | Role | # of projects |
|---|---|---|---|
| 21 | Cerviglas S.L. | Window installation | 9 |
| 22 | Chr. Omstrup & Poul Juul | Window installation | 1 |
| 23 | Confianza Window Tinting, Inc. | Window installation | 1 |
| 24 | Cristalmin | Window installation | 2 |
| 25 | Crystal Window & Door Systems, Ltd. | Window installation | 4 |
| 26 | Custom Glass & Glazing | Window installation | 0 |
| 27 | Dinal OOO | Window installation | 9 |
| 28 | Duluth Glass & Mirror Company | Window installation | 1 |
| 29 | Ecker Window Corporation | Window installation | 22 |
| 30 | Empirehouse, Inc. | Window installation | 41 |
| 31 | Fenstertechnik Schöpper GmbH | Window installation | 1 |
| 32 | Geilinger Fenster + Fassaden | Window installation | 1 |
| 33 | Gulf Coast Builders | Window installation | 4 |
| 34 | H.P. Olsen & Søn | Window installation | 1 |
| 35 | Hardy Window Company | Window installation | 0 |
| 36 | Hentges Glass | Window installation | 0 |
| 37 | Hoosier Glass Company, Inc. | Window installation | 0 |
| 38 | Huron Valley Glass Company | Window installation | 2 |
| 39 | International Energy Savers | Window installation | 1 |
| 40 | Karl Glock GmbH | Window installation | 1 |