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Energy Rating

Energy Rating

Why choose energy-efficient windows?
Our homes and buildings are responsible for almost half of the UK's carbon dioxide (CO²) emissions. What's more, 20 per cent of the heat escaping from an average home is lost through its windows.*

Regulatory measures are being brought to bear to help improve energy efficiency in buildings. The Building Regulations relating to new windows in home extensions are becoming increasingly strict, while the Code for Sustainable Homes sets out mandatory energy-efficiency standards for all new-build properties. For commercial and public-sector buildings, BREEAM environmental assessments set out similarly stringent guidelines.

Homeowners are increasingly demanding energy-efficient products to help cut energy consumption and reduce their energy bills. Furthermore, Home Information Packs (HIPs) now rate properties for energy efficiency on a scale from A to G, similar to that used on white goods. Windows themselves are rated for energy efficiency by the BFRC (British Fenestration Rating Council) on the same scale, making it easier for consumers to choose the best-performing products.

Technical Regulations

Conservation of fuel and power in existing dwellings

All Replacement Windows Shall Achieve:
  • Whole window U-value of at least 1.6 (W/m2K)

  • Window energy rating of band C or better

  • Note: No longer an you generally comply with IGU’s with a centre pane U-value of 1.2 (W/m2K). Special circumstances apply.

All Replacement Doors:
  • Where a glazed panel within a door is equal to or greater than 50% of the entire door area (including the immediate frame but not adjacent glazed panels)

  • Doors within the scope of AD L shall have a U-value not exceeding 1.8 (W/m2K)

  • All other doors require a U-value not exceeding 1.8 (W/m2K)

fensa registered

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