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 offers fenestration product manufacturers a third party verified, nationally-recognized method for demonstrating product design pressure and resistance to flying debris resulting from hurricanes.
Keystone’s Insulating Glass Certification Program is an ANSI-accredited third party quality assurance program specific to the insulating glass (IG) fabrication aspect of the fenestration product. The implementation of IG program requirements will lead to improved seal durability and longevity of IG units.
The Keystone Quality Assurance Program is accredited by the International Accreditation Service (IAS), is officially recognized by the Florida State Building Commission for demonstrating compliance with the third-party quality assurance requirements of the Florida State Product Approval Rule 9N-3 and ICC Evaluation Reports.