1. 3M Company
2. Aditya Profiles PvtLtd.
3. Alcan Products Ltd.
4. American Building Components
5. ATAS International Inc.
6. Atlas Roofing Corporation
7. BASF SE
8. Berridge Manufacturing Company
9. Carlisle Companies Inc.
10. Central States Manufacturing Inc.
11. CertainTeed by Saint-Gobain SA
12. DOW Chemical Company
13. DuPont de Nemours Inc.
14. Duro-Last
Inc by Holcim Ltd.
15. Englert Inc.
16. Etex SA/NV
17. IKO Industries Ltd.
18. Isaiah Industries Inc.
19. Johns Manville Corporation by Berkshire Hathaway Inc.
20. Kingspan Group
21. Maxroof Corporation PvtLtd.
22. McElroy Metal
23. Owens Corning Corporation
24. Pronto Panels
25. Pruszynski Ltd.
26. Safal Group
27. SIKA AG
28. Standard Industries Inc.
29. TAMKO Building Products LLC
30. Tata BlueScope Steel Limited
31. Wienerberger AG