1. Apex Steel Pty. Ltd.
2. Armstrong World Industries Inc.
3. Arpa Industriale SpA
4. Asc Profiles Inc.
5. Atas International Inc.
6. BMC Stock Holdings Inc.
7. Boral Limited
8. Builders FirstSource Inc.
9. Compagnie de Saint-Gobain S.A.
10. CRH PLC
11. Dow Chemical Company
12. Evonik Industries AG
13. Finilex Laminates India Pvt Ltd
14. Fletcher Building Limited
15. Holcim Group
16. Huntsman International LLC
17. Innovative Metals Company Inc.
18. Kingspan Group PLC
19. LX Hausys Ltd.
20. Mueller Inc. by Sur-Seal Company
21. Murus Company Inc.
22. Nippon Steel Coated Sheet Corporation
23. OCI Company Ltd.
24. Primex Building Systems Pvt. Ltd.
25. Red Sea Housing Services