About Keystone
Keystone was founded as a National Fenestration Rating Council (NFRC) licensed Inspection Agency in 1998 by current Director, Marcia Falke, building on her more than 25 years experience in fenestration testing & certification. Sine then, Keystone has added numerous certification, inspection and quality assurance programs focused energy efficiency and structural quality. Our programs are utilized by a wide variety of product categories ranging from building products to appliances.
Keystone retains licenses, accreditations and recognition from a number of accreditation and government bodies, including:
Licensed Inspection Agency by the National Fenestration Rating Council (NFRC),
Accreditation by the American National Standards Institute,
Accreditation by the International Accreditation Service, and
Recognized Certification Body for the ENERGY STAR® program.