Saint-Gobain (France)
Owens Corning (US)
Rockwell International A/S (US)
Kingspan Group (Ireland)
PPG (US)
Armacell (Germany)
Knauf Insulation (US)
L’ISOLANTE K-FLEX S.p.A. (Italy)
Fletcher Insulation (Australia)
Berkshire Hathaway Inc. (US)
BASF SE (Germany)
GAF (US)
Beijing New Building Material (Group) Co. Ltd. (China)
and Broad Group (China)