rehau windows - u-values

Why U-Values are Important for Windows

27 Feb 2020

U-values essentially measure how effective a building material is at transmitting heat between the outside and the inside of the building.
Here at Lichfield Windows we understand the importance of having a good U-value for your glazing, which is why we only provide the finest brands of windows such as Rehau.
In our latest blog we are going to explain the importance of U-values for your glazing.

Explaining U-Values

The lower the U-Value, the slower the rate that heat transfers through the material in question making it a better insulator. The measurement for U-value units is square metre per Kelvin (W/m2K).
When combining all building fabric U-values together to form a collective figure for the entire building, the lower it is, the less energy is required to maintain comfortable temperatures.

How Windows are Insulators

Part L of the Building Regulations states developers should aim for a U-Value of 1.6 W/m2 K for windows installed in a retrofit scenario, or 1.4 W/m2 in a new build. For example, a white Rehau window with standard reinforcement can achieve a U-Value of 1.2 W/m2 K which makes it ideal for any setting.

Rehau windows accommodate a large array of glazing units including the most efficient triple glazed, insulated options, which achieve a U-value less than 1 W/m2K in some circumstances.
Developers and housebuilders should look to achieve the lowest possible U-Value for their windows to offset potential shortcuts or compromise elsewhere.
The insulation properties of a building’s windows are crucial, especially with commercial buildings that are responsible for a large number of the UK’s emissions – which is likely to grow as energy efficiency targets continue to rise.

Talk to Lichfield Windows – The Glazing Specialists

If you would like to know more about Lichfield Window’s range of A-rated windows, please contact us today.
We design, manufacture and install the finest windows in Sutton Coldfield and Lichfield.

Lichfield Windows Ltd.
Blithfield House,
53 Stonehouse Road,
Etching Hill,
WS15 2LL
01543 676269