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Triple glazed sealed units costs more to make than double glazed units. This is because triple glazed sealed units feature an extra chamber that has to be filled up with argon gas, as well as an extra spacer bar and an additional pane of toughened glass. Let’s not forget its weight and size means more in transportation costs.

KJM Group states that in general, it costs around £100 per square metre to over double glaze it. This means the average 1220mm square window will have approximately a 1 square-metre glass. This means around £100 would be added to the cost of an average-sized double glazed window.

Triple Glazed Windows: How Much Do They Cost

We offer an array of windows that are available in many materials and systems. In general, the price of our standard white uPVC window system alongside double glazing would come to just under £500. For triple glazed, you can expect to pay around 25% more. This would come to around £570.

Triple Glazing And Heat-Loss Through Windows

Throughout the UK, homes lose around 15% of heat via windows, which means you’ll want to install insulated products if you plan on replacing your windows. You’ll want to weigh the costs of triple glazed windows to how much you can save in heating, but do bear in mind you will not experience a return on your investment overnight. The choice is up to you, but don’t expect to be paid back anytime soon.

Triple Glazing: The Benefits

There are several benefits of triple glazing, with one being heat insulation. Just remember, not all triple glazing is created equal and there are many types of systems out there. Generally speaking, the panes of the glass should have gaps of at least 16mm and argon gas should be used to fill them, as this is how to reap the most benefits from triple glazing.

Argon gas reduces the loss of heat via the panes. If the gap is reduced, then more expensive gas would need to be used, and this includes gas like krypton. In total, the best size for a triple glazed unit is around 44mm.

U-Values refer to heat losses and you should compare these values. The 44mm triple unit and a 22mm double glazed unit is a huge difference in regards to u-value. Generally speaking, there is more than a 40% improvement with a triple glazed unit.

Triple Glazing And Its Energy Rating

Before you buy a window, you’ll want to check out the Window Energy Rating on the windows you’re considering buying. This is a good way to determine how efficient the windows will be when you install them. WER, which is short for Window Energy Rating, is the method the UK uses to calculate how much heat will be lost via the window that the rating is placed on. Always check the rating before you do anything.
As for what the WER considers, they take the following into consideration:

Air Losses Via The Windows

The U-value calculates how thermally efficient the window is. This includes using both the material used for the frame of the window and the glass of the window. Also taken into consideration is the amount of heat from the sun that goes through the window’s glass to warm up the home. This can improve your home heat loss efficiencies.

In many cases, triple glazing doesn’t enhance solar gain when compared to double glazing. A window that is well-insulated will work very good when it comes to retaining heat. It just won’t do a good job of gaining solar.

Cost Summary

So, is triple glazed windows more than double glazed windows? By our calculations, they cost as much as 22% more. Just remember, these are just costs that have been estimated, but in general, a national glazing company does offer both triple and double glazed windows at affordable prices.

Many of the larger companies mention they will perform free upgrades to triple glazing, but people need to find out what the base price is for the products. Sometimes it’s best to request multiple quotes from companies. In fact, that’s exactly what you should do before you spend your hard earned money on triple glazed windows or double glazed windows for that matter.

Post Author: Conchita Sutphin