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Should You Spend Extra Money on Triple Glazing?

An introduction to triple glazing

In the UK, triple glazing is a concept that is yet relatively new. Homes that endure extreme winter weather, like those in Scandinavia, have used triple glazing as standard fitments for years. The UK does not suffer from the same severe weather conditions, but there are still some harsh winters which is why you should look into getting soundproof windows UK to save money and energy. You can insulate your home in other ways, the floor, the walls and the roof, but if you neglect your windows you are looking at condensation and cold spots.

Triple Glazing Benefits and U-Values
Installing triple glazing will bring you many benefits, but just remember that not all triple glazing is the same. You will find many systems available, but you will get the maximum benefit if the gaps between glass panes are 16mm and these gaps have argon gas filled in them. Argon gas is inert and this helps in reducing the heat loss through the glass. A reduced gap reduces the sealed unit’s thermal performance unless you use gas like krypton, which is even more expensive.

The optimum specifications for a sealed triple glass unit are 4mm glass and 16mm gaps and are referred to in the industry as 4/16/4/16/4, which brings the thickness of the sealed unit to 44mm. Compare the u-values of a double glazed unit which is 28mm thick and a triple glazed unit which has a thickness of 44mm. A double glazed unit will have a u-value of 1.1, while the triple glazed unit will have u-value of 0.62.

Triple Glazing versus Double glazing

To put it in simple terms, a triple glazed unit will just have an added pane of glass when compared to a double glazed unit. This difference enhances its performance in many ways:
Your home becomes warmer because you have one more pane of glass that becomes an added barrier against the winter cold.
This extra pane requires one more spacer bar at the edges of the glass, and this reduces thermal transmittance.
Additional security is also provided to the glass elements of the window, because of this extra pane. In most units, the middle pane is made of toughened glass.
There is a marginal improvement in sound insulation as compared to windows with double glazing that have the same thicknesses of glass all through.
The best energy rating of A++ is given to triple glazed windows.

Any disadvantages to triple glazing?

You will want to know if triple glazing has any disadvantages. The biggest problem that I have encountered in my triple glazed windows is condensation on the external glass. This is because the external pane of glass does not get heated by the heat in the house as much as the other glass panes. As a result, when that glass temperature drops to lesser than that of the outside air, you reach dew point that then helps the condensation to form.

This can occur when the nights are cold and clear and comes in the form of light misting forming on the centre of the external glass pane. It forms at a spot directly opposite to where such misting forms on the inside panes. The reason for this is that glass gets its heat from the frame and spacer bars, resulting in the outer edge of the glass being warmer than the glass in the centre.


To summarise, I like triple glazing and can see no reason why you should not consider the option of triple glazing if you need to change your windows. It does cost more, but it future proofs your home, and the energy savings in future will in the long term recoup all the extra costs. In case you decide to sell your home, triple glazing should make your home more attractive to buyers. Come to KJM for a free quotation where we can give you prices for double glazing that has an ‘A’ rating and also tell you how much it will cost for an upgrade to triple glazing.