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Are Triple Glazed Windows Worth The Upgrade?

When it comes to home building, choosing the right windows is something every investor has to keep in mind. So, in this article, we’ll talk about some of the reasons why triple glazed windows remain a beneficial choice for many and what companies like KJM Group can offer you.

The reality is that the popularity of triple glazed windows is increasing. With each passing day with more and more suppliers entering the marketplace. The windows are particularly popular among those undertaking aluminium builds. But, do the benefits of such windows really outweigh their extra cost? Is triple glazing the best choice for every homeowner?

Deciding on a window type is an issue every self-builder must content with. At the moment, triple glazed window prices are approximately 20% higher than double glazed counterparts, so why would anyone opt for them? Well, fans point to the higher-quality finish and increased comfort such windows offer. Many say the decision to install underfloor heating parallels the dichotomy self-builders find themselves in when choosing windows.

So, when weighing up some of the advantages and disadvantages of triple glazing, here are a few things to consider:

What Is Triple Glazing?

The basic concept behind a triple glazed window is pretty easy to grasp. Such a window contains three planes of glass allowing for two insulating air pockets. The air pockets can be filled with an inert gas, typically argon, or left containing natural air. The purpose of these airlocks is to provide both noise and heat insulation.

The energy efficiency of triple glazing is estimated to be around 50%. Better than that of double glazed windows thanks to the introduction of two airlocks.

To increase the energy efficiency of triple glazed windows further, one has to be cognitive of the gas injected into the air gap as well as the construction of the window frames. In fact, the frames of a window often have more impact on energy efficiency than the layers of glass in the windows. Even a triple glazed window will perform poorly if its frames are porous and abundant. The best windows to buy have insulated frames with a stated airtightness rating.

Comparing Double and Triple Glazing

A fast, yet often inaccurate way of measuring the energy performance of a window is to look at its U value. Glass manufacturers have perfected the art of tinting and coating glass panels with all types of finishes designed to simultaneously reduce heat loss, be self-cleaning, maximize natural light and reduce glare. As you can imagine, with so many competing factors, the U value is far from an ideal reflection of a window’s energy efficiency or value.

A single glazed windowpane can have a U value averaging 5. Meanwhile, double-glazed window panes often achieve a score that suggests the panes perform more poorly depending on the metrics measured. That said, you should always look for windows that have a U value of below 1.6.

The industry standard sets the maximum U value of triple glazed windows at 0.8, while many manufacturers claim a 0.5 U value rating. For context, when it comes to walls, the U value is always less than 0.3, meaning even triple glazed windows are considerable contributors to a building’s overall thermal efficiency. Consequently, manufacturers remain under constant pressure to improve their products.

Will We See Quadruple Glazing in the Future?

The reality is that there’s more to be gained from improving current technologies. For instance, low emissivity coating can be applied to internal-facing panels to stop heat from escaping. The size of the airlock cavities can also be optimised. In addition, manufacturers can start using inert gases to fill airlocks. The insulating quality of the windows frames used can also be improved.