Sealed Units (IGUs)

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• Outdated or damaged tints and coatings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

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 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?

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.

• Serving Ottawa and the greater National Capital Region
• Call us at 613-738-9500 orrequest a quote online.