Keystone Certification and Quality Assurance Programs
For more than 27 years, Keystone Certifications has helped manufacturers and building product companies achieve compliance, demonstrate product quality, and gain market confidence through trusted certification and quality assurance programs. Whether pursuing product certification, maintaining ongoing compliance, or strengthening quality assurance programs, clients benefit from practical guidance and dedicated support every step of the way.
Get Started with Keystone
NFRC Inspection Agency (IA) Services Program
Keystone is a National Fenestration Rating Council (NFRC) licensed Inspection Agency (IA). The NFRC Certification Program offers fenestration (window, skylight, 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.Safety Glazing Certification Program
Keystone's Safety Glazing Certification Program is ANSI National Accreditation Board (ANAB)ISO/IEC 17065 accredited by the ANSI National Accreditation Board (ANAB) to provide certification of safety glazing materials for all glass in building applications, from fenestration products to guard rails, and shower glass.Fenestration Certification Program

The Keystone Fenestration Certification Program is accredited by the ANSI National Accreditation Board (ANAB) and theStandards Council of Canada (SCC), providing fenestration manufacturers with a full slate of nationally-recognized product certifications for both the US and Canadian markets.Insulating Glass Certification Program
Keystone's Insulating Glass Certification Program is ANSI National Accreditation Board (ANAB) accredited and NFRC recognized to provide insulating glass (IG) manufacturers with certifications to both the US and Canadian IG seal durability standards.Keystone Quality Assurance Program
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.StarGuardTM Energy Performance Certification Programs
Keystone's StarGuardTM Energy Performance Certification Programs qualify imaging equipment products for the ENERGY STAR® Program. Keystone Certifications is a recognized Certification Body (CB).
The inspector was incredibly patient and informative while working with her. She was quick on responses and helped us get our quality assurance program into compliance quickly and efficiently. We look forward to working with her again.
- Commercial Concrete Products
The inspector is very helpful, made the entire process go very smoothly and was a great help getting us up to speed.
- Mullet's Aluminum Products
The inspector was great! We continue to have many questions, and he has always been very patient and kind to answer those questions. He does things the right way but is helpful with our questions and mistakes. He helps us to understand what all of the NFRC changes have been and how we are to move forward in compliance.
- Wolf Windows LLC
Your Sales Manager and Client Coordinator are so kind, they are always ready to help. Thanks.
- GoGlass
I've been working with Keystone for 5-6 years now, and honestly the experience has always been great! The Inspectors are both great to work with, always a pleasure for sure.
- Titoni Window Systems
The whole team consists of very attentive and knowledgeable people. KCI is truly an awesome company to work with.
- AA Impact Garage Door
The inspector has done an amazing job. She has been very helpful, informant, and insightful. Would recommend 100%.
- Sentrigard Metal Systems
The inspector was very nice to work with. She was informative and showed compassion for her job and my company.
- Synergy Windows
Very pleased with service provided, the inspector is very professional and knowledgeable which help us understand all of the requirements.
- Dorplex
The Client Coordinator is amazing. The way she was always available and ready to help with any of my questions (even the stupid ones) is amazing.
- Superb Metals LLC
Because of the trust we have built together and the quality of their work, Keystone continues to be our preferred partner. We have never felt the need to look elsewhere, as this partnership consistently brings confidence, stability, and peace of mind.
- Simpas SA