Energy Efficiency. Comfort. Longevity.
When it comes to energy performance and occupant comfort, your windows’ sealed units are doing the heavy lifting. Centennial Glass specializes in the supply, installation, and replacement of commercial-grade insulated glass units (IGUs)—helping buildings across Ottawa and the Valley reduce energy loss, eliminate condensation, and maintain year-round comfort.
Whether you’re managing a retrofit or new construction, we deliver high-quality sealed units customized for your building’s glazing system, exposure, and performance needs.
Foggy glass? Failing units? Planning an upgrade?
What Is a Sealed Unit (IGU)?
An IGU, or insulated glass unit, is a sealed assembly of two or more panes of glass separated by a spacer and filled with insulating air or gas. This unit is what creates a thermal barrier between the interior and exterior of your building.
At Centennial, we install and replace double-pane and triple-pane IGUs designed to maximize:
- Thermal performance (U-value improvement)
- Sound insulation for busy urban or institutional sites
- Condensation control and internal climate stability
- UV protection and solar heat management (with Low-E coatings)
Looking for enhanced acoustic or thermal insulation?
Sealed Unit Repair & Replacement
Over time, commercial IGUs can suffer from seal failure, resulting in condensation or a foggy, distorted appearance. Our experienced glazing technicians provide fast, exact-match replacements to restore both function and clarity—without disturbing your existing framing or hardware.
Common issues we fix:
- Condensation or “fogging” between glass panes
- Cracked or chipped interior or exterior panes
- Gas leakage or spacer failure
- Outdated or damaged tints and coatings
- Compatibility issues with framing systems
We custom match:
- Glass thickness and tint
- Spacer bar colour and width
- Low-E coatings and thermal treatments
- Internal grills or muntins (if applicable)
Have fogged or damaged glass units in your building?
Visit our Commercial Window Repair page to learn how we can help.
IGUs for All Types of Commercial Properties
Centennial installs and replaces sealed units across a wide range of building types:
Office towers and commercial plazas
Institutional buildings (schools, hospitals, government)
Condominiums and mixed-use developments
Retail storefronts and vestibules
Hotels, restaurants, and cultural centres
Whether your IGUs are part of a ribbon window, punch window, or curtain wall system, we ensure a perfect fit, high performance, and consistent appearance.
Options and Enhancements for IGUs
We offer a wide selection of glass types and configurations to meet your building’s thermal, acoustic, and aesthetic needs:
- Low-E coatings (soft or hard coat)
- Argon or krypton gas-filled units
- Tinted and reflective glass options
- Triple-pane units for enhanced performance
- Built-in decorative grills or blinds
If you’re unsure which configuration is best, our team can help you evaluate R-value, SHGC (solar heat gain), visibility, and aesthetic considerations.
Need glare or solar heat control too?
Why Choose Centennial Glass?
- Over 55 years of commercial glazing experience
- Advanced glass diagnostic tools and on-site measurements
- Seamless IGU replacement with minimal disruption
- Custom configurations for commercial glazing systems
- Fully certified and insured installation team
- Full support for architects, developers, and facility managers
Want help specifying IGUs for your next project?
Get the Performance You Expect from Your Glass
If your building’s sealed units are underperforming or nearing the end of their lifespan, Centennial Glass provides expert guidance, fast turnaround, and flawless replacement. We’ll help you reduce heating and cooling costs while restoring clarity and comfort for your tenants, staff, or guests.
- Call 613-738-9500
- Visit Our Showroom at 8–855 Industrial Avenue Ottawa ON K1G 4L4
- Request a contractor quote