Windows can be a major source of heat-loss. A home with single glazed windows might lose as much as 60% of its heat. Naturally, this means higher heating bills, and an increase in the amount of energy needed to keep the house warm. The best way to save heat is to prevent it from leaving your home in the first place, so it stands to reason that doing something to stop the windows from leaking so much precious energy will be the most cost effective measure.
What is double glazing?
Instead of a single pane, double glazing uses two panes of glass separated by an air (or gas) filled space, usually about 16mm wide. The air between the panes reduces the transfer of heat and keeps the cold on the outside and the warm air within. Other benefits of double glazing include the reduction in noise levels coming from outside and the prevention of condensation.
The need to keep heating bills to a minimum and an increasing awareness of ecological issues in general has led many people to upgrade their windows from single to double glazed. The costs of adding an extension to your home can be considerable, but in the long run it is well worth ensuring that your extension does not become a burden on your heating bills because the windows are not double-glazed. Having double glazing windows and doors installed in the first instance will help to save money in the long run, and reduce your home’s carbon footprint.
A scheme run by the British Fenestration Ratings Council, or BFRC, assesses windows and frames on their energy efficiency and gives them an energy rating between A and G. Each window is given a label which details its energy rating (A being the most efficient) and also provides information about the window’s thermal transmittance, solar factor and effective air leakage.
The BFRC also lists registered suppliers of rated energy-efficient windows – visit the website for more details.
More about double glazing
If you are thinking about getting double glazing windows and doors installed in your home, there are many options to consider. Our Windows & Doors Buying Guide lists the various window and door designs available, as well as the choice of frame materials on offer. To get an idea of the prices involved, have a look at How much does double glazing cost?