Understanding Energy-Efficient Windows
on 01/02/2019

The benefits of installing energy-efficient windows are obvious. You’ll reduce condensation and damp, cut nuisance noise and enjoy a warm and comfortable home with lower energy bills. Understanding how energy-efficient windows work will help you get the best out of them and make the right choice when it’s time to upgrade.

Double or triple glazing?

Double glazed windows are composed of two sheets of glass with a gap between them that is often filled with inert gas. This creates an insulation barrier that keeps cold out and heat in. Triple glazing adds another pane, but is it worth the extra cost?

Triple glazing is common in Scandinavia, but in the UK, you may be better off saving your money and investing in the best-quality double glazing you can afford. That’s because the efficiency of your windows depends on more than the number of panes of glass.

Understanding U values

Most double glazing units have an energy efficiency rating between E (worst) and A++ (best). The rating is evaluated on the glass and the frame. Your new windows will also have a U rating, which is the measurement of how easily heat can be lost through a particular material. The lower the U value, the less heat can pass through and get lost.

When evaluating replacement windows Cheltenham properties can rely on for maximum energy efficiency, look for the lowest U rating you can afford. A double glazing company like firmfix.co.uk/windows will be able to advise you on the best choice for your home.

Understanding materials

The energy efficiency of your windows depends on both the glass and the frame, so it pays to understand how your windows are built to select the most appropriate materials for your property.

UPVC windows are long-lasting and low maintenance; choose a recyclable option for sustainability. Timber frames have the lowest environmental impact but do require maintenance, so you may prefer composite frames with a timber core and a weatherproof plastic or aluminium coating. If you prefer an ultra modern look, slimline aluminium glazing is ideal for the barely-there look.

Coupled with Low-E glass that cuts heat loss, an inert gas like krypton or xenon in the gap between the panes and warm edge spacers, you’ll have highly efficient windows that could you save you over £100 a year.