The pros and cons of fitting triple glazing
Now, more than ever, homeowners are looking for ways to improve the energy efficiency of their homes, reduce heating costs, improve security and, of course, create a comfortable living environment.
Triple glazing has gained popularity for its exceptional thermal efficiency and noise reduction properties.
Whilst the all-important additional pane of glass can offer significant benefits, it is essential to understand the pros and cons of investing in triple glazing, to make sure it’s the right choice for your home’s situation and surroundings.
What is triple glazing?
Whereas double glazing has two panes of glass, with triple glazing, a third pane of glass is incorporated within the sealed unit, which is the glazed part of the window that sits within the frame.
The space between the panes is filled with an insulating gas such as argon, which enhances the window’s thermal efficiency.
The advantages of triple glazing
The sheer robustness of triple glazing brings with it some key advantages as you’d expect. However, it can be of most benefit for quite specific locations and circumstances.
Energy efficiency and heat retention
One of the most significant aspects of triple glazing is the enhanced insulation. The extra layer of glass, along with the insulating argon gas between the panes, helps to reduce heat loss, making it ideal for homes in colder climates and in the winter months.
Triple glazing helps retain heat, meaning your home stays warmer for longer without relying as heavily on central and other forms of heating. Typically, triple glazed windows achieve an A++ rating for their energy efficiency.
Does triple glazing keep heat out?
The insulating properties of double glazing can work both ways. In warmer climates, triple glazing assists by blocking the sun’s rays and reducing heat gain, reducing the need for air conditioning. There are of course different types of glass that will also do this job.
Is triple glazing suitable for UK homes?
For most UK homes, extremes of heat and cold are an exception rather than the norm, so, on the whole, quality double glazing will be sufficient for improved energy efficiency.
However, triple glazing used strategically for a north facing window, that doesn’t receive much natural light, may be a good way to bring extra insulation without minimising the benefits of natural warmth.
Noise reduction
For some homeowners, managing external noise may be a priority, whether this is from a nearby road, a flight path or proximity to a commercial property. For UK homeowners, this is one of the main reasons for installing triple glazing.
Does triple glazing reduce noise?
Yes, one of the benefits of triple glazing is its ability to reduce noise.
The additional glass layer provides increased soundproofing. The thickness and spacing of the panes can also influence dampening of outside noise, creating a quieter indoor environment when windows are closed.
There is, however, also an option of using acoustic glass, or laminated glass.
Acoustic sealed double glazing
In some environments, external noise pollution can cause the central pane of glass in triple glazed windows to vibrate, which can have the unwanted effect of amplifying sound.
Therefore, in circumstances where triple glazing may not be the best choice, acoustic sealed double glazing can provide excellent sound proofing. At Window Wise, our acoustic sealed double glazed unit has been specifically designed to reduce noise.
Reduced condensation
Condensation occurs when warm, moist air inside the home meets a cold surface, typically a window.
Does triple glazing stop condensation?
Its increased thermal efficiency means that triple glazing keeps the inner pane of glass warmer than with double glazing, which reduces the chances of condensation forming on the interior side of the glass.
However, if your home has high humidity or lacks adequate ventilation, some condensation may still occur, particularly around window frames.
Does triple glazing stop external condensation?
Ironically, when it comes to external condensation, the more energy efficient the glass, the greater the likelihood of condensation forming on the exterior the windows.
Whilst the internal pane of glass will warm up with the room, minimising internal condensation, none of this warmth will reach the outer pane of glass. This means that it will be colder and more prone to external condensation when outside humidity levels are high and/or the temperatures are particularly cold.
Security
Where security is a particular concern, triple glazed windows can provide an effective barrier.
The three panes of glass in triple glazed units, along with the required robust frame construction, mean that they are very difficult to break into.
However, we only recommend triple glazing for security when the home or commercial property is particularly vulnerable to break ins. Double glazed windows already provide ample levels of security for most properties, and there is a range of locking mechanisms available with all our replacement windows to ensure your peace of mind.
The disadvantages of triple glazing
The increased complexity in the construction of triple glazing has some implications for its cost and how it is installed.
Cost
Triple glazed windows are minimally more expensive compared to double glazed units. It is important to evaluate whether the longer-term benefits in sound insulation, energy savings or security justify the investment in triple glazing.
Remember that, depending on where your home is situated, the additional insulation provided by triple glazing may not result in significant energy savings compared to double glazing. You may find that double glazing offers a better balance of cost and efficiency.
Installation
Triple glazing is typically thicker than double glazing, which can add complexities to its installation.
How thick is triple glazing?
Whilst the thickness can vary, most triple-glazed units are around 36-44mm thick, compared to double glazing, which is usually 28mm.
This added thickness can make triple-glazed windows heavier and may require stronger window frames. Additionally, not all properties may be suitable for retrofitting with triple glazing due to the weight, without significant structural alterations.
Talk to the experts
Considering triple glazing for your home or commercial property?
Please come to see us at our Haywards Heath showroom or book a design consultation, so that we can best advise you whether triple glazing is the right solution for you.
Our helpful team are available on 01444 457 145.