Should You Opt for Triple-Glazed Windows


Picking the right glazing for your building is important and so, if you’ve been considering triple-glazed windows, you may want to read this post.

Triple glazed windows have become almost a standard in the past several years. Most people are looking to improve energy efficiency in their buildings. It not only reduces costs but results in a more sustainable future. Double-glazed windows have proved to be better than their single-pane counterparts and so, triple-glazed must be the next best option, right?

Well, the answer is not that simple as there are several factors to consider before installing triple-glazed windows. Given triple glazed windows for about 20% more than the double, kind, why should homeowners opt for them? According to experts, you should consider the comfort and quality, similar to underfloor heating.

That being said, here are some of the most important things to keep in mind when looking at the advantages and disadvantages of triple glazing. But first just what is it?

As the name implies, triple glazing consists of 3 glass panes in a sealed frame, just like how double glazed contains 2. Between each windowpane is an air pocket of inert gas, usually argon. Inert gases are heavier than air and work better as an insulator for heat and noise.

The third pane is found in-between the outer and inner panes and creates two airlocks, thus improving the performance of double glazing by about 50%. Variables like the kind of air used in between the panes, coating on the glass to minimize energy loss, and warm edger spacer bars around the perimeter to minimize thermal bridging and further improve the windows’ energy efficiency. Also, frames have a huge bearing on the overall performance, including insulation. As such, you’ll want to look for insulated frames with an excellent airtightness rating.

Triple vs Double Glazing- Which is Better?

Similar to walls, roofs, and floors, the U-value measurement is the best when it comes to looking at the energy performance of materials. Glass manufacturers are experts at tinting or coating glass with all kinds of finishes with the aim of reducing glare, trapping heat inside, blocking unwanted sunlight and even allowing for self-cleaning. The net result of this design implies that glazing U values have substantially reduced, double glazing surrey can go over things with you and come to what is the best option for your business or home.

Single glazed windows usually have a U-value of 5.0W/m²k. The double kind tends to have a score of over 3, but thanks to improvements over the years, they can now achieve 1.4. As a result, Building Regulations now call for a U-value no worse than 1.6 for any window you install nowadays. The Passivhaus standard calls for triple glazed windows with a U-value no more than 0.8.

Currently, the U-value required for walls is 0.3 and so, it is evident that windows are still a weak point in the overall energy efficiency of a building. This makes the huge pressure to improve the performance of triple-glazed windows understandable.

Glazing Manufacturing Improvements

Enhancements in this industry have been brought about by:

  1. Including wider cavities between the two glass panes, with 16mm being the optimum distance.
  2. Filling the cavities with inert gas, most preferably, argon.
  3. Adding low-emissivity coatings to prevent heat leaks.
  4. Designing out cold bridges like aluminium spacers that surround the glazed windows.

As you can see, there are several substantial differences between double and triple-glazed windows. If you are looking for better insulation, both in terms of heat and noise, then you should go for the triple-glazed kind. The initial price might be higher, but it will certainly save you a lot in energy bills down the line.

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