Keystone Certification and Quality Assurance Programs

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Keystone's third party certification, inspection and quality assurance programs enable manufacturers to demonstrate compliance with energy efficiency programs, the ENERGY STAR® program, building codes, marketing claims, and utility and tax rebate programs.

  • NFRC IA Services Program

    NFRC Licenses Keystone is a National Fenestration Rating Council (NFRC) licensed Inspection Agency (IA). The NFRC Certification Program offers fenestration (window and door) manufacturers a third party verified, nationally-recognized method for demonstrating product U Factor, Solar Heat Gain Coefficient (SHGC) and other energy performance characteristics.

  • Insulating Glass Certification Program

    ANSI Accredited SCC Accredited Keystone's Insulating Glass Certification Program is ANSI and SCC accredited and NFRC recognized to provide insulating glass (IG) manufacturers with certifications to both the US and Canadian IG seal durability standards.