Thermal Insulation
Warmer rooms, lower energy bills, no draughts — with the original window completely untouched.
Up to 65% less heat loss
A properly sealed secondary glazing unit with Low-E soft-coat glass delivers U-values as low as 1.868 W/m²K — comfortably meeting modern building-regs requirements for a retrofit and outperforming most 1990s double glazing.
- U-values from 1.868 W/m²K
- Low-E soft-coat glass option
- Elimination of draughts
- Warmer room-side glass surface
Energy bills and payback
Most customers report a noticeable drop in gas usage within the first heating season. In period townhouses with single-glazed sashes, payback typically falls between 6 and 10 years — faster in properties with electric heating.
Comfort you can feel
The most immediate benefit is comfort. A warmer inner glass surface stops the cold-window downdraught that makes seats near the window uncomfortable in winter, and eliminates the surface-condensation problem in bathrooms and bedrooms.
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South Yorkshire's specialists in secondary glazing — survey, measure, manufacture and install.