How much can energy efficient windows reduce heating costs?
Upgrading from old single glazing or inefficient double glazing to A-rated windows can cut heat loss by as much as 70%.
In a typical semi-detached UK property, this could save between £100 and £300 annually on heating. Larger or detached homes usually see higher savings due to greater window area and energy demand.
Savings depend on several factors, including U-values, airtightness, total window area, property type, and insulation levels.
Which window styles are most efficient at saving energy?
The type of window affects heat retention. Casement and tilt & turn designs seal tightly, reducing draughts, while traditional sash windows can be less airtight.
Choosing high-performance, well-sealed styles ensures lower energy bills and improved comfort. TradeMark advisors can help you pick the most effective solutions for your home.
A, B, and C-rated windows explained
The WER system grades windows from A to C. A-rated windows provide superior heat retention and efficiency, while C-rated windows meet basic building requirements but don’t maximise comfort or savings.
Upgrading from C to A-rated windows can noticeably reduce draughts, keep rooms warmer, and lower bills. It’s a win win.
Why U-values matter
U-values indicate the rate of heat loss and the lower the number, the better the window insulates. Typical ranges include:
Single glazing: 5.0–6.0 W/m²K
Older double glazing: 2.8–3.0 W/m²K
Modern A-rated windows: 1.2–1.6 W/m²K
By considering WER and U-values together, you can select energy efficient windows that improve comfort and energy efficiency. TradeMark’s team makes it easy to find the right solution for your property.
LOOKING TO REPLACE YOUR WINDOWS?
We have a fantastic range to choose from so whether it’s a modern style or traditional timber effect windows – we are confident that we will have windows to improve any home to give it the finished look with elegance.
LOOKING TO REPLACE YOUR WINDOWS?
We have a fantastic range to choose from so whether it’s a modern style or traditional timber effect windows – we are confident that we will have windows to improve any home to give it the finished look with elegance.
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