Keystone Insulating Glass Certification Program
Ensure long-term insulating glass performance and meet NFRC and ENERGY STAR requirements with ANAB-accredited IG certification. Reduce warranty costs, minimize seal failures, and provide peace of mind to manufacturers and consumers.
ANAB Accredited — Recognized by National Fenestration Rating Council (NFRC) for US and Canadian IG seal durability standards
Why Insulating Glass Certification Matters
Minimize Warranty Costs
Maximize IG unit durability through proven quality control procedures and bi-annual audits, dramatically reducing IG-related warranty and service costs.
Meet NFRC & ENERGY STAR Requirements
Fulfill National Fenestration Rating Council (NFRC) and US EPA ENERGY STAR® IG certification requirements for fenestration product manufacturers.
Proven Quality Control
Experienced Keystone staff work with participants to establish proven quality control procedures, then perform bi-annual audits to ensure implementation and sustainability.
Build Customer Confidence
Provide verified credentials to manufacturers and peace of mind to consumers through third-party certification of seal durability.
Certification Standards
Keystone IG Certification Program provides certification to both US and Canadian seal durability standards:
US Standard: ASTM E2190
ASTM E2190 — "Standard Specification for Insulating Glass Unit Performance and Evaluation"
The primary US standard for IG seal durability and performance verification.
Canadian Standard: CAN/CGSB 12.8
CGSB 12.8 — "Insulating Glass Units"
Canadian standard for insulating glass unit performance and durability.
What Makes IG Durability Critical
The durability of sealed insulating glass products is highly dependent on glass room workmanship and attention to detail. Key factors include:
- Proper seal application and curing
- Quality control procedures
- Material selection and handling
- Environmental exposure protection
- Manufacturing consistency
- Staff training and expertise
How IG Certification Works
Quality System Setup
Work with Keystone staff to establish proven quality control procedures specific to IG fabrication operations.
Performance Testing
Submit IG specimens to a Keystone recognized laboratory for periodic testing per ASTM E2190 or CGSB 12.8.
Bi-Annual Audits
Undergo bi-annual facility audits to verify quality control procedures are implemented and sustained over time.
Required for NFRC & ENERGY STAR Programs
NFRC Requirement — IG certification is required for fenestration manufacturers participating in NFRC programs
ENERGY STAR Compliance — Fulfill US EPA ENERGY STAR IG certification requirements for windows, doors, and skylights
Ready to Get IG Certified?
Download the Getting IG Certified Checklist to learn how manufacturers become Keystone IG Certification Program licensees.
The checklist includes Qualification Rules to consider when determining how to build IG specimens for testing. For personalized guidance, contact our certification experts.
Why Choose Keystone for IG Certification?
ANAB Accredited — ISO/IEC 17065 accreditation ensures the highest certification standards
Industry expertise — Experienced staff with deep knowledge of IG fabrication and quality control
Ongoing support — Bi-annual audits and continuous guidance to maintain quality standards
Start Your IG Certification
Contact our IG certification experts to discuss seal durability testing and quality assurance program requirements.
Resources & Standards
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