1. Abbey Glass (Derby) Ltd
2. Adrian Welch Glass & Glazing Ltd
3. AGC Inc.
4. ASHASI Glass Co.
5. Cardinal Glass Industries Inc.
6. Chevron Glass Pty. Ltd.
7. Clayton Glass Ltd.
8. Clearview Glaziers Company Limited
9. CN Glass Limited
10. Compagnie de Saint-Gobain S.A.
11. Connaught Windows Ltd
12. Eastern Windows Manufacturing Co Ltd
13. Elite Double Glazing
14. Glass & Glazing Systems Pvt. Ltd
15. Granada Secondary Glazing Ltd.
16. Gunj Glass
17. Metro Performance Glass Ltd
18. Neuffer Fenster + T?ren GmbH
19. Nippon Sheet Glass Co. Ltd.
20. Orion Windows Limited
21. Park Glass Ltd
22. Ravensby Glass Co Ltd
23. Scotia Double Glazing Limited
24. Shenzhen Sun Global Glass Co. Ltd.
25. Stevenage Glass Company Ltd
26. Total Aluminium Solutions
27. VELUX Group
28. Weatherbeater Windows