Triple glazing has long promised superior thermal performance, yet in the UK it has remained a niche solution. Excessive weight, increased unit thickness, fabrication challenges, and compatibility issues with existing frames have led to triple glazing often being viewed as impractical for mainstream use, particularly in the replacement window market.
Regency Triple featuring Corning® Enlighten™ Glass represents a decisive shift away from these limitations.
Developed through a close collaboration between Regency Glass and Corning Incorporated, this next-generation triple-glazed unit has been engineered to deliver the full performance benefits of triple glazing in a format that aligns with the realities of UK manufacturing, installation and specification.
Thinner & lighter
The defining innovation within Regency Triple is the integration of Corning® Enlighten™ Glass as the middle pane. At just 0.5mm thick, this advanced Boro-aluminosilicate glass enables a triple-glazed configuration that is radically thinner and lighter than conventional TGUs.
The result is an ultra-thin glass triple-glazed unit that fits seamlessly into a standard 28mm cavity, making Regency Triple immediately viable for the replacement window market. In this sector, traditional triple glazing hasn’t previously been an option.
Weight reduction is equally transformative. Regency Triple delivers a 30% weight reduction compared to conventional triple-glazed units, while remaining only 5% heavier than a standard double-glazed unit. For fabricators and installers, this translates into easier handling, reduced strain on hardware and fixing systems, and improved safety and efficiency on site.
High performance
Regency Triple delivers high levels of thermal insulation, resulting in measurable, real-world energy performance improvements without requiring bulky frame upgrades or costly system changes.
In a standard 28mm cavity, Regency Triple achieves a U-value of 0.8 W/m²K, making true triple glazing viable within frame systems that have traditionally been limited to double glazing.
Where deeper cavities are specified, performance improves further. In a 36mm cavity, Regency Triple delivers a U-value of 0.6 W/m²K, while a 40mm to 44mm cavity configuration achieves an exceptional 0.5 W/m²K. These performance levels are achieved at a substantially lower unit weight than standard triple glazing designed to reach similar U-values.
The system’s flexibility is enabled by a Thermo Plastic Spacer (TPS®), which allows custom cavity widths, even when using laminated glass. This gives fabricators and specifiers greater control over thermal performance while maintaining slim sightlines, frame compatibility and design intent.
Supporting the performance of Regency Triple is Corning® Enlighten™ Glass, which offers high thermal durability without the need for tempering. Its resistance to field thermal breakage ensures long-term reliability and confidence across a wide range of applications, including retrofit, renovation, and high-performance new-build projects.
A new benchmark for triple
Historically, triple glazing in the UK has been associated with compromise: heavier units, thicker profiles, restricted frame options and diminishing returns. Regency Triple has been developed specifically to eliminate these barriers.
By combining advanced materials science with practical IGU engineering, Regency Glass has created a triple-glazed unit that integrates smoothly into existing workflows, from fabrication through to installation and long-term use. This makes triple glazing not only technically achievable but also commercially viable at scale.
The result is a premium product that works across the entire supply chain.
The collaboration between Regency Glass and Corning Incorporated brings together decades of glazing expertise and world-leading materials innovation. Corning’s long-standing legacy in ultra-thin, high-performance glass underpins the technical foundation of Regency Triple, enabling performance levels that were previously unattainable in a UK-ready format.
Regency Triple featuring Corning® Enlighten™ Glass is more than a product launch; it represents a shift in how triple glazing is perceived in the UK. By removing barriers, enhancing performance and delivering a truly premium solution, Regency Glass is setting a new benchmark for what triple glazing can and should be.
For an industry seeking higher performance without added complexity, Regency Triple offers a clear path forward.
