Sealed triple-glazed units are far more expensive to make than their double-glazed counterparts as they have an extra argon gas-filled chamber, an extra spacer bar, an extra toughened glass pane, and additional transport costs owing to the pane’s dimensions and weight. The difference between double-glazed and triple-glazed windows lies in the fact that the latter factors an extra square meter into its construction. With double-glazed windows costing about £100/square meter and considering that an average 1220mm (or 4ft) square window has around a 1m square of glass, this means you’d have to add an extra £100 to get an average-sized triple-glazed window. Here, experts at KJM Group explain further.
Determining the Cost of a Triple Glazed Window
While we have a vast range of window options with different material choices and systems, if we just stuck to our typical uPVC window system with several options for double-glazing, the installed value, inclusive of VAT, would be about £465. As such, a triple-glazed window of similar dimensions would cost about £565 – costing about 22 per cent more.
Heat Loss and Triple Glazing
In the United Kingdom, houses typically lost about 20 per cent of indoor heat through windows. If you are planning on having your windows replaced, consider having quality insulated products fitted for better heat retention.
If you are thinking of getting triple-glazed windows, keep in mind that triple glazing costs more. Nevertheless, the benefits far outweigh the cost, especially considering how much these windows will save you when it comes to energy bills. While it may take some before the windows pay themselves back, investing in triple-glazing is something worth doing. According to one of our customers, triple glazing is the best product to get if you want to live as comfortably as possible. The final decision is yours to make, and all we can do is educate you and hope you make the right choice.
There are many benefits to installing triple-glazed windows in your home with the main one being heat insulation. However, it is worth noting that triple glazing isn’t the same. With so many triple-glazed systems in the market, how do you get the max benefit from your window? Well, one way is to ensure that the gap between glass panes is 16-millimetres and is filled with argon or any other inert gas.
The good thing about argon is that it reduces the amount of heat lost through the glass panes. When the gap between panes is reduced, the sealed unit’s thermal performance also reduces – unless you prefer using more expensive inert gases like krypton. When it comes to sealed triple-glazed units, the optimum size should 16-millimetre gaps between 4-millimetre glass panes. In the glazing industry, this is what’s referred to as the 4/16/4/16/4 unit, which totals to 44mm. If you compare the heat losses or u-values of a 44mm triple-glazed unit with those of a 28mm double-glazed unit, you will notice that the difference is quite huge. The typical u-value for centre pane in a 44-millimetre unit is .62, while that of a double-glazed unit is 1.1 – an over 40 per cent improvement.
When shopping for a window, you can choose units based on the number of glass panes contained. Nevertheless, you still need to make sure you first check the unit’s WER or Window Energy Rating. This rating is one of the best ways of predicting how thermally-efficient units will be once they are installed.