24 Hr. Thermal Glass Insulation Ltd.
A.W.G. Northern Distribution Ltd.
All Weather Windows
Allsco Building Supplies
Andersen Corporation
Associated Materials Inc.
Atlantic Windows
AVS Windows Ltd.
Bronco Industries Inc.
Can-Am Glass Products
Cardinal Glass Industries
Central Glass (Duncan) Ltd.
Central Valley Glass Ltd.
Clearview Industries Limited
Double Seal Insulating Glass Ltd.
Eco Glass
Garibaldi Glass Industries
General Glass
Gentek Building Products
Glass Enterprises Inc.
Guardian Industries Corp.
High Performance Glazing Inc.
Huron Window Corporation
Insulite Glass Co. Inc.
Insul-lite Manufacturing (2008) Ltd.
Jeld-Wen Windows & Doors, United Window Division
Jeld-Wen Windows & Doors, Willmar Window Division
Jeld-Wen, Inc.
Kohltech International Ltd.
KP Building Products Ltd.
Laurier Glass Ltd.
Les Portes Decko Inc.
Liberty Glass Fabricators, Inc.
Marlboro Window & Door Mfg. Ltd.
Marvin Windows & Doors
Mathews Brothers
MI Windows and Doors, LLC
Milgard Manufacturing
Multiver Ltée
Newmar Window Manufacturing Inc.
NEXT Energy Tech
Nordik Windows Inc.
Northerm Windows
Northfield Glass Group Ltd. dba. City Thermo Pane
ODL Inc.
Paramount Windows
Pella Corporation
Pilkington North America Inc.
Pollard Windows, Inc.
PPG now Vitro Architectural Glass
Prelco, Inc.
Prestige Window & Door Ltd.
ProTemp Glass Inc.
Robover Inc.
Saand London Inc.
Saand Ottawa Inc.
Saand Toronto Inc.
SAGE Electrochromics Inc.
Seymour Windows Ltd.
Shaw Glass Company Inc.
SIGCO, Inc..
Simonton Windows
Standard Doors Inc.
Tanglewood Conservatories
T.C. Insulating Glass Inc.
Templados del Centro, SA de CV
Thermafix A.J. Inc.
Thermal Seal Insulating Glass Co. Inc.
Therm-O-Proof Mfg. Ltd.
Thompson I.G. LLC
Toronto Glass (Heat Seal) Ltd.
Trulite Glass and Aluminum Solutions
United Arab Aluminum Company
Van Isle Windows Ltd.
View, Inc.
Viracon Inc.
Vitrum Industries ltd.
Western Glass Inc.
Window City Industries Inc.

Allmetal, Inc.
Argon Filling Systems, Inc.
Bystronic Inc.
Dow Silicones
Eduard Kronenberg GmbH
Electronic Fluorocarbons LLC
FDR Design Inc.
Fenzi North America Inc.
GED Integrated Solutions
H.B. Fuller Canada Inc.
H.B. Fuller Inc.
IGIS Co., Ltd.
Integrated Automation Systems LLC
Leading Edge Distribution
Marc Prevost Machinery Inc.
Momentive Performance Materials Inc.
PDS IG Holding LLC
Perfection Plastics

Quanex Building Products
Ramapo Sales & Marketing
Royal Adhesives & Sealants
RPM Rollformed Metal Products Ltd.
SilicaStar Industries, Inc.
Sika Corp.
Sparklike Ltd
Technoform Glass Insulation NA
Thermoseal Group Limited

Allana Buick & Bers, Inc.
BVDA Façade Engineering Ltd.

Chris Barry, Glass Consultant
exp Services Inc.
Federal Aviation Administration

Ferguson Corporation
Front, Inc.
The Gary Law Group
Gordon H. Smith Corp.
IGMA Australia
Larson Engineering, Inc.
Layton Consulting Ltd.
Mihko Engineering c/o Glazing Engineering
Morrison Hershfeld
Neil B Hall & Associates, LLC
RPM Consulting, Inc.
Simpson Gumpertz & Heger
Stern & Co. LLC
Steve Brown Machinery Solutions (SBMS)
Wiss, Janney, Elstner Associates Inc.
WSP Canada Inc.

Auditing and Inspection
CLEB Laboratory, Inc.
Intertek Testing Services NA Ltd.
Keystone Certifications Inc.
National Certified Testing Laboratories, Inc.

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