CertainTeed Corp.
P.O. Box 860
Valley Forge, PA 19482
Phone: 800-274-8530
www.certainteed.com

Knauf Fiberglass
240 Elizabeth St.
Shelbyville, IN 46176
Phone: 800-825-4434
www.knauffiberglass.com

Johns Manville
P.O. Box 5108
Denver, CO 80217
Phone: 800-654-3103
www.jm.com

Ottawa Fibre, Inc.
3985 Balgreen
Ottawa, Ontario
Canada K1G 3N2
Phone: 613-736-1215
www.ofigroup.com

Owens-Corning
One Fiberglass Tower
Toledo, OH 43259
Phone: 800-766-3464
www.owenscorning.com