About Keystone

Keystone was founded as a National Fenestration Rating Council (NFRC) licensed Inspection Agency in 1998 by Former President, Marcia Falke, building on her more than 25 years experience in fenestration testing & certification. Since then, Keystone has added numerous certification, inspection and quality assurance programs focused on energy efficiency and structural quality. Our programs are utilized in 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, as well as memberships and affiliations with various industry associations, including:

Licenses, Accreditations, & Recognitions

Accreditation Photos Licensed Inspection Agency by the National Fenestration Rating Council (NFRC).

Accreditation Photos Accreditation by the American National Standards Institute (ANSI).

accreditation photo Accreditation by the ANSI National Accreditation Board (ANAB)

Accreditation Photos EPA Recognized Certification Body (CB) for the ENERGY STAR® program.

Accreditation Photos Florida Department of Business and Professional Regulation (DBPR) Recognized Quality Assurance Entity.

Accreditation Photos Florida Department of Business and Professional Regulation (DBPR) Recognized Validation Entity.

Memberships & Affiliations

Accreditation Photos Member of the Fenestration Manufacturers Association since 2003.

Accreditation Photos Contributing to standards development as a member of the ASTM.

Accreditation Photos Affiliate member of the Efficient Windows Collaborative.

Fenestration Canada Member of Fenestration Canada.