1. 3M Company
2. Adex Systems Inc.
3. Allana Buick & Bers Inc.
4. Amvic Inc.
5. BASF SE
6. Dryvit Systems Inc.
7. DuPont de Nemours Inc.
8. Durabond Products Ltd.
9. Durock Alfacing International Limited
10. Foundation Building Materials
LLC
11. Henkel AG & Co. KGaA
12. Johns Manville by Berkshire Hathaway Company
13. Kingspan Group
14. Knauf Insulation GmbH
15. Koch Industries Inc.
16. Master Wall Inc.
17. MUHU (China) Construction Materials Co. Ltd.
18. Negwer Materials
19. Omega Products International Inc.
20. Owens Corning
21. Parex USA Inc.
22. Pleko Systems
23. ROCKWOOL A/S.
24. Saint-Gobain Group
25. Shingobee Builders Inc.
26. Sika AG
27. Simpson Gumpertz & Heger Incorporated
28. STO SE & Co. KGaA
29. Terraco Group
30. Wacker Chemie AG