Fire Rated Insulated Glass Units (IGUs)

Advanced Glazing Solutions for Life Safety, Security & Thermal Efficiency   What Are Fire Rated Insulated Glass Units? Fire Rated Insulated Glass Units (IGUs) combine the energy efficiency of insulated glazing with the critical life-safety protection of fire-rated glass. These units are designed to withstand extreme heat, contain flames and smoke, and meet stringent building code requirements — all while offering thermal insulation, optional privacy, radiation shielding, and even bullet resistance. At Lead Glass Pro, we specialize in custom FireLite® IGUs, using fire-rated, wire-free ceramic glass combined with a secondary pane tailored to your project needs. Our units are tested, certified, and built for performance in fire-rated walls, doors, and partitions. 1" Thick Overall X-Ray Lead Glass + Spacer + Fire-Rated Glass Optional Window Frames for Walls or Doors Key Benefits 1/16" (4#) Lead Equivalency - Radiation Shielding for X-Ray Rooms Fire Ratings Up to 180 Minutes Tested to withstand up to 3 hours of fire exposure in temperature-rise doors and up to 90 minutes in rated walls. All units pass Hose Stream and Positive Pressure tests. Thermal Insulation Multi-pane construction reduces heat transfer, contributing to energy savings and improved building performance. Impact & Safety Rated Available with ANSI Z97.1 and CPSC 16 CFR 1201 Category I & II safety ratings. Multi-Functional Glass Options Integrate privacy, bullet resistance, radiation protection, and more — all in a single unit. FireLite IGU Specifications Standard Thickness: 1" overall (varies by configuration) Available Fire Ratings: 20, 45, 60, 90, 120, 180 minutes Maximum Sizes: 90-minute walls: Up to 2,627 in² (max height/width: 56.5") 45/60-minute walls: Up to 3,325 in² 180-minute doors: 100 in² max exposed glass area Labeling: Permanently marked with fire rating and safety compliance Meets or Exceeds: UL 10C, UL 9, UBC 7-2/7-4, NFPA 80/252/257, CAN4, CSFM, and more Approved In: NYC (MEA 290-90-M-6) and Los Angeles (LARR 25798) Optional Secondary Pane Configurations Enhance your Fire Rated IGU with functional glass types, including: X-Ray Leaded Glass (Up to 1/16" lead equivalency or higher) Bullet Resistant Glass (Up to UL 752 Level 3 with 2-hour fire rating) One-Way Mirror (Visual privacy from one side only) Frosted or Acid-Etched Glass (Two-way privacy) Clear Tempered Safety Glass Laminated or Safety Filmed Glass (FireLite Plus / FireLite NT) More options available upon request Fire Rated IGUs for Doors Non-Temperature Rise Doors: FireLite NT or FireLite Plus Ratings: 20, 45, 60, 90 minutes Max exposed glass: 20–60 min: 36" x 89" 90 min: 36" x 56.5" Temperature Rise Doors: Up to 180-minute fire rating Max exposed glass area: 100 in² Fire Rated Lead X-Ray Glass IGUs Combine radiation shielding and fire protection in one certified glass unit. Our lead-lined fire rated IGUs are available with: Lead Equivalency: 1/16" standard (custom levels available) Overall Thickness: 1"+ depending on configuration Weight: Approx. 12+ lbs/sq.ft. Maximum Size: 96" x 48" (subject to rating and code limits) Matching Fire Rated Frames Available Certifications & Approvals All Fire Rated IGUs are tested and certified to meet or exceed: UL 9, UL 10B, UL 10C NFPA 80, NFPA 252, NFPA 257 UBC 43.4, UBC 7-2, UBC 7-4 CAN/ULC S-104, S-106 CSFM 43.7 NYC MEA 290-90-M-6, LARR 25798 Applications Hospitals & Imaging Suites Laboratories & Cleanrooms Fire-Rated Doors & Partitions Secure Facilities (Bullet & Blast Resistance) Schools, Government & Commercial Buildings Privacy Applications (One-way or frosted glass) Request a Quote or Contact Us Looking for certified fire rated insulated glass units that meet complex performance standards? We’ll help you design the ideal IGU for your application — including lead shielding, bullet resistance, privacy, and more. 📧 Email: sales@leadglasspro.com 📞 Call Us: 800-506-9972 🔗 Request a Quote Online Protect People. Meet Code. Simplify Installation. Choose Lead Glass Pro for Custom Fire Rated Insulated Glass Units.