1. Atlas Roofing Corporation
2. Carlisle Companies Incorporated
3. CertainTeed by Saint-Gobain Group
4. DuPont de Numerous Inc.
5. Duro-Last Inc.
6. GAF Materials LLC
7. Gardner-Gibson Company
8. GCP Applied Technologies Inc.
9. IKO Industries Ltd.
10. Intertape Polymer Group Inc.
11. Keene Building Products Inc.
12. MFM Building Products Corp.
13. Owens Corning
14. POLYGLASS S.p.A by Mapei S.p.A.
15. Royal Group Inc.
16. TAMKO Building Products LLC