The main types of window spacers on the market
PVC Spacer
- Sensitive to thermal expansion
- Risk of premature delamination
- Less effective in climates with large temperature fluctuations
Aluminum or Steel Spacer
- Cost-effective solution
- Highly conductive material
- Creates a significant thermal bridge
- Increases energy loss and condensation
Polymer Foam Spacer
- Good thermal performance
- Less rigid for large insulated glass units
- May deform under the weight of the glass
The Best Choice: Swiss Spacer Ultimate
After analyzing and comparing available technologies, Profenex selected Swiss Spacer Ultimate, a next-generation warm-edge window spacer.
Manufactured from a reinforced fiberglass composite, it offers:
- High structural rigidity
- Superior moisture resistance
- Extremely low thermal conductivity
- Full compatibility with triple glazing
Energy Benefits of the Swiss Spacer Ultimate Window Spacer
Using Swiss Spacer Ultimate helps to:
- Reduce edge-of-glass heat loss by up to 30%
- Significantly lower the U-factor
- Minimize cold drafts near windows
- Limit interior condensation
- Maintain insulated glass seal integrity for decades
👉 Result: improved comfort, energy savings, and enhanced durability—even in northern climates like Québec.
Proven Technology for Québec’s Climate
The latest generation of Swiss Spacer Ultimate features:
- A design that reduces the risk of argon gas leakage
- Advanced sealing technology
- Stable performance under extreme climate conditions
Why does Profenex use Swiss Spacer Ultimate?
All our double- and triple-glazed windows are:
- ENERGY STAR® certified
- Equipped with Swiss Spacer Ultimate
- Designed to deliver superior energy efficiency
This technology choice allows us to offer windows that go beyond market standards, with consistent, long-lasting thermal performance.
High-Quality Insulated Glass Units
At Profenex, our insulated glass units are manufactured to the highest standards, in collaboration with Robover, a company recognized for the quality, precision, and durability of its insulated glazing units.
see the video: https://youtu.be/wED3csGoYog?si=StrUFD3SWWfebPp1
Thanks to automated bending technology:
- Spacers are formed without cut corners or welds
- Most units feature only a single joint, increasing durability
- Each spacer is filled with desiccant beads to absorb residual moisture
- A primary sealant is applied to retain insulating gas and prevent infiltration
- Glass panes are carefully washed, rinsed with deionized water, and dried before assembly, ensuring optimal quality
The glass panes are carefully washed, rinsed with deionized water, and dried before assembly, ensuring optimal quality.
In Summary: The Importance of the Window Spacer
A window spacer is far more than a simple technical component—it plays a decisive role in a window’s energy performance, durability, and comfort. A poor choice can lead to thermal losses, premature condensation, and reduced insulated glass lifespan. Conversely, a high-quality spacer can transform a standard window into a truly energy-efficient solution.
That is why Profenex has chosen Swiss Spacer Ultimate, a next-generation warm-edge spacer recognized for its low thermal conductivity, structural stability, and exceptional moisture resistance. This technology significantly reduces heat loss at the edge of the glass, lowers the U-factor, and improves indoor comfort—even in Québec’s demanding climate conditions.
The performance of Swiss Spacer Ultimate is fully realized thanks to the expertise of Robover, an insulated glass manufacturer known for precise manufacturing processes, high-quality materials, and rigorous assembly control. Advanced technologies such as automated bending and optimized sealing systems ensure long-lasting airtightness and structural stability.
By combining Swiss Spacer Ultimate, high-quality Low-E glass, and Robover’s proven know-how, Profenex delivers durable, high-performance windows designed to meet the highest energy-efficiency standards.
That is why we rely exclusively on proven, high-performance technologies.
➡️ Swiss Spacer Ultimate + Low-E glass + argon gas = maximum energy performance
