How Does Double Glazing work?

How Does Double Glazing work?

uPVC Window cross section

If your home is fitted with older, single-glazed windows then you could be losing significant amounts of heat from your home.

As well as the financial aspect of installing double-glazed windows (no one wants to receive a high gas bill at the end of the month), there is also the comfort aspect.

Anyone who has sat in front of the television and had to layer-up in blankets and jumpers to avoid the chill of cold draughts circulating through the house will know how frustrating poor insulation can be.

With this in mind, here is how double-glazing works in your home to keep you warm.

The practical details 

To understand how double-glazing can benefit your home, it’s easier to understand how it works in the first place.

In the most basic terms, double-glazing consists of two panes of glass, with a layer of gas between it. Many people may already know this; however, what you might not know is that this gas between the two panes is not just regular air (a mixture of gases).

It’s argon gas that’s used to fill the gap, as it is far less conductive of heat.

After all, you don’t want to fill it with a gas that will pull the heat out into the open air. It’s this process that keeps your heat inside. 

Does the second pane make a difference? 

You might wonder just how effective the second layer of glass is at keeping heat inside, but it actually provides a very important function.

Not only does it keep the argon trapped inside, but it also keeps noise levels down.

The second pane functions as a means of keeping your home peacefully quiet, as well as keeping it nice and toasty.

Single Glazed Windows

How was double-glazing developed? 

Double-glazing was a natural follow-on from windows with two sashes (double-hung) and windows with two layers of glass (such as storm windows). Storm windows are not always made from glass, however. If your home has storm windows, you can still get double-glazed versions installed, as sometimes storm windows have a plastic coating. 

Is double-glazing the same as secondary glazing?

Not entirely: secondary glazing involves installing a second sheet in front of a separate single-glazed window.

You may notice this in older buildings, particularly those with building regulations that may prohibit the installation of double-glazed windows.

It is certainly cheaper than double-glazed windows, but not as effective at keeping the cold out.

If you have moved into a building with secondary glazed windows, it should ideally be seen as a temporary measure. 

It’s surprising how a simple combination of glass and a specific element from the periodic table can take your home from chilly to comfortable.

Double-glazed windows are perfect for keeping heating bills down and your eco-credentials high.

They also keep outdoor noise out, which is perfect for anyone living in a built-up area, such as a busy city centre.

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