Manufacturing floor

Certifications and Quality Assurance for your Products


Keystone's third party inspection and certification programs enable window, door, and skylight manufacturers to demonstrate compliance with the requirements of building codes, the ENERGY STAR® Windows Program and other utility/tax rebate incentive programs.

Insulating Glass
Insulating Glass

The Keystone Insulating Glass Certification Program is accredited by the American National Standards Institute (ANSI) and the Standards Council of Canada (SCC), the program is recognized by the National Fenestration Rating Council (NFRC) to provide insulating glass (IG) manufacturers with certifications to both the US and Canadian IG seal durability standards.

Quality Assurance

The Keystone Quality Assurance Program is an ANSI National Accreditation Board (ANAB) accredited third party inspection program that verifies building envelope products as qualified for various Product Evaluation & Approval Programs, including Florida Product Approval, ATI-Code Compliance Research Reports (CCRR), and Dade County Building Code Compliance Office (BCCO) Notice of Acceptance (NOA).

Electronics / IT

Keystone's StarGuard Energy Performance Certification Program qualifies Home Electronics and Information Technology (IT) Products for the EPA's ENERGY STAR® program. Keystone was one of the first Third Party Certification Bodies recognized by the EPA, and our experienced staff can help you navigate the ever-changing requirements to obtain and maintain ENERGY STAR® listings.