Triple Glazed Window Unit — Residential Casement WindowsThe casement window — side-hung or top-hung — is the most common window type in UK homes. Our Triple Glazed Window Unit is engineered to fit the frame profiles used by leading casement window manufacturers, delivering U-values from 0.7 to 0.9 W/m²K in the most popular window format.Whether you're replacing failed sealed units in existing casement frames or specifying new windows for a renovation, our triple-glazed units drop straight into most modern uPVC, aluminium, and timber casement systems. The result: a step-change in thermal and acoustic performance without changing your window style.SpecificationOur standard triple-glazed window units are available in 28mm, 32mm, and 36mm overall thickness to suit different frame systems. All units include Low-E coating and argon gas fill as standard. U-value: 0.7–0.9 W/m²K (depending on build-up) Thickness options: 28mm, 32mm, 36mm Low-E coating: Included as standard Gas fill: Argon (90%+) Glass options: Clear, obscure, tinted, solar control Compatible with most modern window frame systems including uPVC, aluminium, timber, and composite. Custom sizes manufactured to order.Manufactured to BS EN 1279 at our Bristol facility. FENSA registered, 10-year warranty, nationwide delivery.Use our glass configurator to specify your frame system, dimensions, and glass preferences for instant pricing.
