Is Double Glazing Worth It?

When buying new or replacement windows for your home you should certainly consider all the benefits that double glazing can offer you. Improve your home efficiency, emit lower CO2 emissions, reduce condensation and decrease outside noise levels all with a sound investment of double glazing.

Let us explain exactly why double glazing is worth it, especially as we enter colder Winter months.

Why Double Glazing? 

Unlike single glazed panels, which transfer cold easily throughout your home, double glazing creates an effective barrier against both heat and noise.

Consisting of two panels of glass sandwiched between the outer and inner frame, a void between the two panes is filled with Argon gas (or in fact Xenon or Krypton) acting as an insulator.

All homes lose heat through their windows – in fact, 18% of heat is lost through windows in uninsulated homes – so energy efficient double-glazing is an effective way of reducing energy bills and keeping your home warmer and quieter.

When you’ve purchase double glazing, you can even give yourself a pat on the back for reducing your carbon footprint.

However, it is important to note that whilst double glazing can improve your energy bills, don’t be fooled into believing that your new windows will pay for themselves.

You’ll even notice a reduction in noise from outside as double glazing is particularly good at sound proofing.

When Investing in Double Glazing Look Out For… 

There are many options to consider when choosing your new or replacement windows and remember that uPVC frames are not the only choice – although the cheapest, most energy efficient. It is important to think about how much maintenance you are willing to undertake, your budget and areas of conservation too.

There are however, 4 main features we would advise you to really think about when choosing the right window for your home or business.


Whilst the cost and savings for energy efficient glazing will be different for each home, choose wisely and you could see average savings of £170 a year – that’s £3,400 over their expected life span of twenty years.

When purchasing your windows check for ratings from The British Fenestration Rating Council (BFRC) who run a scheme assessing how well windows retain heat. On a scale of A to E the higher the rating, the more efficient your glazing. They also provide guidance on further factors to consider including its ability to keep wind out; ability to resist condensation; and improved sound insulation.

You should also look out for Low Emissivity (Low-E) glass which has an invisible coating of metal oxide on one of the internal panes which lets in light and heat but reduces the amount which escapes.

Remember: Casing is just as important too, as well as other factors including your type of property, local climate and indoor temperatures.

Gaps Between The Glass 

On the whole the most energy efficient windows will use either Argon, Xenon, or Krypton to fill the void between the two panels. This gas has a greater density than air, so is therefore more effective when reducing heat loss from your property. Argon tends to be the most commonly used as it is extremely cost-effective, colourless,  non-flammable and does not react to other gases.

Pane Spacers 

You’ll see these spacers set around the inside edges of the window to ensure that the two panes of glass are kept apart. Whilst commonly made of aluminium, we suggest you look out for warm edge (or thermal break) spacers.


Replacing aluminium with a low heat-conductive material like warm edge spacers reduces the heat which can be lost around the perimeter of double glazed windows.  The bar itself is filled with a desiccant to absorb residual moisture within the cavity and therefore further prevent condensation.


Your new replacement windows will ultimately be more airtight than older, original frames so essentially condensation can build up due to reduced ventilation.

If there isn’t much else in terms of airing within your home, we advise you look for replacement windows with trickle vents incorporated into the frame which allows a controlled amount of ventilation.

So, Now You Want Double Glazing? 

All of this sounds pretty great doesn’t it?

Why wouldn’t you want a warmer and quieter home?

Give us at a call at Crystal Clear on 0117 9717 880 for more information on all our high energy efficient double glazing units.