The benefits of Triple Glazing with composite windows

Energy efficient glazing can help reduce your carbon footprint and your energy bills – but are the benefits of triple glazing really worth considering over double glazing?

Triple glazed windows are becoming an ever popular option with window manufacturers, and with triple glazing only costing around 10% more than double glazing, home-owners are finding them a surprising affordable upgrade from double glazing, with many additional benefits…


What is triple glazing?

Although it might seem obvious, triple glazing is three panes of glass fitted within a sealed frame, where double glazing is two panes of glass. The space between the panes of glass is filled with a pocket or air or gas – argon gas in the case of Westcoast Windows, which is heavier than air and insulates against heat/cold and sound. At an additional cost, Westcoast Windows also offer krypton gas filling for superior U-value efficiency.


How energy efficient is triple glazing?

In the case of triple glazing, the two cavities created by the three panes of glass significantly improve the window’s energy efficiency compared to regular double glazing.

Furthermore, Westcoast Windows triple glazing utilises ‘warm edge’ technology with insulated super spacers and weather seals housed into the grooves within the sash to achieve exceptional air and weather prevention.

Westcoast Windows are a true bonded construction composite window of a low maintenance aluminium outer bonded to the internal timber, which acts as a thermal break enabling the frame to offer very high levels of insulation.

If you consider U-value measurements for comparison, where the lower the U-value the better the efficiency:

In real terms, if you are to consider the makeup of your home, an insulated wall will provide U-values of around 0.2-0.3W/m2k.

  • Single glazing has U-values of approximately 5.0 W/m2k.
  • Double glazing generally achieves around 1.3-2.0 W/m2k.
  • Triple glazing with Westcoast Windows Design Series can achieve as low as 0.9 W/m2k

With these values in mind you would perhaps see an improvement of around 5% in the overall energy performance of your home. Where this is likely to have a small positive impact on your energy bills, perhaps more importantly it is further reducing the cold spots in your house, resulting in a more comfortable home.


Does triple glazing improve sound-proofing?

Where double glazing can typically achieve an acoustic performance of around Rw32, with the benefits of triple glazing this can be improved into the low 40s, which is particularly useful if the home is situated on a busy road, railway or flight path.


Is triple glazing better for the environment?

With the growing pressure for consumers to be more aware of their impact on the environment, energy saving measures like triple glazing are only likely to become more popular. Where it may not add more value to your home, it may be looked upon more favourably by environmentally conscious home buyers.


Should you switch to triple glazing?

Although triple glazing is widely used in colder climates such as Scandinavian countries, there are some that argue it is not essential in our more milder climes in the UK. Therefore if you already have double glazing in your home and there is nothing wrong with your windows, it is unlikely to be worth replacing with triple glazing. However if you are embarking on a self-build, conversion or renovation where you do require new windows, it may be worth considering the benefits of triple glazing for the reasons we have discussed.

To find out more about Westcoast Windows Swedish manufactured triple glazed composite windows go to:


Sources and further information:

The benefits of Triple Glazing with composite windows
The benefits of Triple Glazing with composite windows
The benefits of Triple Glazing with composite windows