Whilst the gap in between double glazing panels was traditionally filled with air, the use of argon gas is becoming more popular nowadays, and it’s clear to see why…

If the goal of new windows and doors is energy efficiency and reduction of noise pollution, we’ll look into the added benefits argon gas provides.

Your house is full of weak areas where heat can escape (or come in), causing those energy bills to rise.

Of course, doors and windows are two particularly weak spots in the home, which is why scientists and double glazing manufacturers have been working hard over the years to improve things.

As such, it’s important to remember that not all double glazed windows and doors are created equally.

The type of glass, the construction of the window frame, the design of the unit and even the air that goes between the window panes all play a role in how well it performs…

But with the oxygen we breathe being completely free, why is argon used in double glazing instead of air?!

Read on to find out…

What Is Argon Gas?

Argon gas is a non-toxic, odourless and colourless gas.

It’s also ‘inert’ which means that, under most circumstances, it won’t react with other elements (or sunlight) which can cause corrosion and other issues.

Approximately 1.5 times heavier than air, it’s an excellent insulator because it does not conduct electricity and does not support combustion.

The use of argon gas in the home is nothing new; it’s used in some types of energy-efficient light bulbs and is one of the reasons why CFL (compact fluorescent light) bulbs last up to 10 times longer than traditional incandescent bulbs.

Why Is Argon Gas Used In Double Glazing?

The double pane window is nothing new, but traditionally the gap between the glass was simply air.

Filling this with argon gas instead is a relatively new technique, first appearing in a double glazed window in the 1990s and rising to prominence much more recently.

It’s make-up means it is particularly efficient at keeping heat from escaping through windows, so the house can be warmer in the winter and cooler in the summer.

It’s also an excellent insulator of noise as the heavier gas molecules help to absorb sound waves, preventing them from passing through the window.

This can of course be especially beneficial for homes located near busy roads or airports.

Whilst using argon is more expensive than air(!) and other types of gas, it’s still less expensive than other insulation materials, making it a cost-effective option for window manufacturers and homeowners alike.

Due to its heavier molecular make-up, argon gas windows are also much less likely to suffer from condensation.

So not only are they keeping your energy bills down, they’re also reducing the chance of costly glass replacements further down the line.

What’s the disadvantage of Argon Gas?

Not much!

The main downside of using argon gas in double glazing is that it is slightly more expensive than the other types of gases used, such as krypton and xenon.

However, the increase in cost is often offset by the energy savings and other benefits that argon gas provides.

Round Up

Aside from talking with your local window-fitter, the best way to determine if your windows are energy-efficient is to look for the Window Energy Rating (WER) documentation for the unit you have (or want to) buy.

Overall, Argon gas is an excellent option for making sure your windows are providing top quality insulation.

The extra expense up-front should easily pay for itself in reduced heating bills in the coming months and years.

Thanks for reading! 

Looking for more ideas on energy-efficient doors and windows?

Check out our articles on the best bifold exterior doors or why cleaning your double glazing better can extend its life. 

Matt James
Matt James

Hi, Matt here! I started out almost 20 years ago as a teenager working in the family business fitting doors, windows and conservatories. I now run this website to share the best tips and advice for anyone looking to get a good deal on double glazing.