Keystone Fenestration (Structural / Impact) Certification Program

ANSI Accredited The 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. The Keystone Fenestration Certification Program allows window, door, and skylight manufacturers to certify the structural performance of their products, rated as a result of testing to one or more referenced standards.

To qualify for certification, the manufacturer must submit samples of the products as manufactured to one of several Keystone recognized laboratories for physical testing to the appropriate referenced standard.

The fenestration product performance ratings associated with this program are based on a standardized evaluation of the product conducted by an independent accredited laboratory in accordance with the specified referenced standard. Individual products are NOT certified unless they bear the permanent label containing the Keystone Certification mark. Actual fenestration product performance may vary based on many factors, including installation, condition of the wall/roof substrate and the age of the product and installation components. Keystone Certifications, Inc. makes no representations or warranties with respect to the actual performance or quality of any products. Keystone Certifications, Inc. shall have no liability for any defective products or for any product performance failure.