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.
Keystone is a National Fenestration Rating Council (NFRC) licensed Inspection Agency (IA) that offers window and door certification services. 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.
The Keystone Fenestration Certification Program is accredited by the American National Standards Institute (ANSI) and the Standards Council of Canada (SCC), providing fenestration manufacturers with a full slate of nationally-recognized product certifications for both the US and Canadian markets.
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.
The Keystone Quality Assurance Program is accredited by the ANSI National Accreditation Board (ANAB), is officially recognized by the Florida Department of Business and Professional Regulation (DBPR) for demonstrating compliance with the third-party quality assurance requirements of the Florida State Product Approval Rule 9N-3 and ICC Evaluation Reports.