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doors, windows, glazing & hardware
Real-world results from UK installations Triple glazing is no longer a theoretical advantage; the UK now has enough installed projects to show clear, measurable outcomes. Across a range of domestic and commercial sites, improvements reported include: • Substantial reductions in heating demand, especially in older homes being upgraded to triple glazing as part of a whole-house retrofit. • Noticeable acoustic improvements, with noise levels reduced dramatically compared to modern double glazing. This makes triple glazing particularly attractive for developments near busy roads, rail lines or urban centres. • Enhanced comfort in edge zones, such as areas near large sliding doors or full-height windows where traditional units often leave occupants feeling cold. Etheridge Windows compiled data from across the UK which
showed that households could save up to £250 a year on their energy bills by installing modern triple glazing. Design considerations for architects: Matching sustainability with aesthetics Historically, some architects were cautious about triple glazing due to worries over frame depth, weight, or visual bulk. Modern systems, however, have evolved significantly. Key considerations now include: Frame profiles: Slimmer profiles and thermally broken systems mean architects can maintain clean sightlines without sacrificing performance. Solar gain strategy: In well-insulated and well-oriented buildings, triple glazing helps avoid overheating while still capturing beneficial daylight. Aesthetics vs performance: Triple glazing now comes in a broad range of styles, colours, openings, and finishes, allowing designers to meet sustainability targets without compromising design intent. Structural load: While slightly heavier than double glazing, current installation systems and hardware options allow even large architectural units to be safely incorporated. For many architects, triple glazing is no longer a “premium add-
on” but a practical tool for meeting client expectations and regulatory demands. Practical guidance for specifiers and contractors Higher-performance glazing does not have to mean higher complexity. The key for specifiers and contractors is to choose manufacturers who can supply systems engineered specifically for triple glazed units. Points to consider include: Whole-unit performance: Look beyond centre-pane U-values and focus on the performance of the complete window system, including frames and seals. Installation quality: The thermal benefits of triple glazing rely on airtightness and correct fitting. Poor installation can undermine even the best specification. Cost management: While triple glazing can carry a higher initial price, whole-life costing tells a different story. Lower heating demands and improved EPC ratings can deliver long-term savings and add value to the property. Lead times: Work with suppliers who manufacture and install in- house to avoid delays and ensure consistency. By selecting robust, well-designed systems, contractors can
incorporate triple glazing into projects without destabilising budgets or timelines.
Future-proofing for Net Zero: Why triple glazing fits the bigger picture As the UK pushes towards Net Zero, the building envelope is under increasing scrutiny. Fabric-first design is now the dominant approach, with insulation and glazing performance central to every sustainability model. Triple glazing plays a critical role in creating Net Zero-ready structures: • It reduces the energy load on heating systems, supporting electrification through heat pumps. • It helps buildings reach the lower U-values expected in upcoming regulations and building standards. • It aligns with growing consumer and investor demand for buildings with long-term energy resilience. The transition to triple glazing is part of a broader shift towards
smarter, more efficient and more future-proof construction. With governments, lenders, buyers, and commercial tenants all prioritising energy efficiency, the direction of travel is clear.
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