Keystone Fenestration Certification Program
The first fenestration certification program accredited by both ANAB and SCC, providing internationally recognized certification for windows, doors, and skylights. Meet US and Canadian building codes, qualify for ENERGY STAR® programs, and demonstrate compliance with structural, impact, and energy performance standards.
Dual Accreditation — The only program accredited by both ANSI National Accreditation Board (ANAB) (USA) and Standards Council of Canada (SCC) (Canada) for comprehensive North American market access.
Why Choose Keystone Fenestration Certification?
International Market Access
Only program with dual ANAB (USA) and SCC (Canada) accreditation, enabling seamless compliance with both US and Canadian building codes and energy programs.
ENERGY STAR® Qualification
CSA A440.2 certifications are recognized by Natural Resources Canada (NRCan) for ENERGY STAR® Canada Certified Products , while NFRC certification qualifies products for US ENERGY STAR® Partners .
Comprehensive Testing Standards
Certification covers NAFS and CSA A440S1 structural performance, ASTM impact resistance, and CSA A440.2 energy performance in one integrated program.
Building Code Compliance
Demonstrate compliance with US and Canadian building codes through third-party verified testing from accredited laboratories across North America.
Certification Types Available
Structural & Impact Certification
Standards: NAFS, CSA A440S1, ASTM Impact Resistance
Coverage: Windows, doors, and skylights for US and Canadian markets
Verify structural performance and impact resistance for building code compliance and hurricane zone requirements.
Thermal/Energy Performance Certification
Standard: CSA A440.2
Coverage: Canadian energy performance ratings
Required for ENERGY STAR® Canada qualification and energy code compliance. Recognized by NRCan.
Products Covered
- Residential Windows
- Commercial Windows
- Entry Doors
- Patio Doors
- Skylights
- Curtain Walls
How Certification Works
Product Submission
Submit product samples to a Keystone recognized laboratory in the US or Canada for testing or simulation.
Testing & Evaluation
Products undergo rigorous testing per NAFS, CSA A440S1, CSA A440.2, and/or ASTM standards at accredited laboratories.
Certification & Labeling
Upon passing, products receive Keystone certification marks and are listed in public directories for verification.
Ready to Get Certified?
Choose your certification path:
- Structural/Impact Certification (US and Canada): NAFS Getting Started Checklist
- Thermal Certification (Canada):CSA A440.2 Getting Started Checklist or Transferring to CSA A440.2 Checklist
For program participation details and fee information, review the checklists or contact our certification experts.
Industry-Leading Dual Accreditation
First and only fenestration certification program accredited by both ANAB and SCC
International recognition — Seamless access to both US and Canadian markets
Comprehensive coverage — Structural, impact, and energy performance standards in one program
Note: Fenestration product performance ratings are based on standardized evaluation by independent accredited laboratories per referenced standards. Individual products are NOT certified unless they bear the permanent Keystone Certification mark label. Actual product performance may vary based on installation, substrate condition, and product age. Keystone Certifications, Inc. makes no representations or warranties regarding actual performance or quality and has no liability for defective products or performance failures.
Resources & Checklists
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