Clayton Glass has taken a technically focused step forward in insulated glazing with the launch of Triple28™, a triple-glazed unit precisely engineered to match the industry-standard 28mm sealed unit thickness, a dimension historically reserved for double glazing across the UK housing stock.

The configuration of Triple28™ is built around a three-pane system with a total build-up constrained within 28mm, requiring a rebalancing of cavity spacing and material distribution compared to traditional 36–44mm triple-glazed units. At the centre of the design is a fully glass monolithic core, removing intermediate plastic components typically used in spacer or support structures. This not only improves recyclability but also optimises internal rigidity while maintaining a reduced overall weight.

Thermally, the unit delivers a U-value of 0.8 W/m²K, achieved through a combination of narrow cavities, advanced coatings, and gas filling strategies. This level of performance allows installers to meet stricter energy-efficiency requirements without transitioning to deeper or reinforced window systems. Clayton Glass highlights that, in real-world applications, this can result in up to 90% improvement in heat retention compared to legacy double-glazed units, particularly in older properties with outdated glazing.

Weight has been a critical engineering constraint. Traditional triple glazing often increases load significantly, requiring stronger hinges and frames. Triple28™, however, is designed to be only marginally heavier than a standard double-glazed unit, ensuring compatibility with existing hardware and avoiding additional structural adjustments during installation.

The product also includes a laminated glass option, which integrates an interlayer for enhanced acoustic dampening and impact resistance. This makes it suitable for urban environments where both thermal and sound insulation are key performance criteria.

According to Managing Director Ryan Green, the innovation lies not just in performance, but in removing the retrofit barrier, allowing installers to upgrade glazing units independently of the window frame. This creates a cost-effective pathway for improving building envelopes without the disruption of full window replacement, particularly relevant for large-scale renovation projects.