Here At Double Glazing Nottinghamshire, Nottinghamshire, We Are Looking Into The Question If Triple Glazing On Your Windows Or Doors Is Better Than Double. For many years the UK window market has concluded that the idea of bigger means better. The market for double glazing has changed consistently starting from an overall thickness of 20MM to 24MM and ultimately settling down on 28MM despite having the information that 24MM is the best option available thermally with air or argon gas cavities. .

The misconception that bigger is better also influenced the growth of frame depths, from 60mm to 70mm with no real technical advantage

A recently asked question is – is 3 better compared to 2? Or is triple glazing more advantageous than double glazing? ( There’s no simple answer to this. Everything, As Always, Is In The Detail Of The Work. We must have in mind the specs of any recommended IGU (Insulated Glass Unit) to offer a good response to that question.

The present industry standard which is being applied for double glazed units is off one 4 MM pane of low E [low emissivity] coated glass and one pane of 4 MM plain annealed glass along with a 20MM cavity of argon gas [makeup = 4-20-4]

1.1 W / kilojalores per metre squared is the u-value of the center panel offered. If a center pane of plain glass is introduced, but the overall thickness of the unit is retained at 28 MM [4-8-4-8-4] we can arrive at a U value of 1.2 W/M sq. K which will deliver a performance that will be worse than a double glazed unit. Although, if we add to the total thickness of the triple glazed unit by extending the cavities between the panes, we start to enhance the unit’s efficiency. A u-value of 0.9 W / kilojalores per metre squared can be obtained with the ideal thickness of 44 mm (4 – 16 – 4 – 16 – 4). We could enhance this more by bringing in a second “Low E” pane in which the unit u-value turns to 0.6 W / kilojalores per metre squared.

Going from 1.1 W / kilojalores per metre squared to 0.6 W / kilojalores per metre squared is a difference that worth the money, this is a big improvement on the temperature regulation

A widely accepted industry standard for measuring thermal performance and a part of Building Regulations, The Window Energy Rating Scheme judges heat loss as well as solar gain. This implies that the triple glazed unit’s enhanced heat loss qualities are greatly nullified by the reduction of heat produced by the sunshine.

However, in order to increase the solar gain by using low iron glass that is more translucent than the conventional variety can be substantially more expensive

There other elements that must be noticed by every triple glazing provider. Thermal stress can cause units to crack. Due to the centre panel of glass in a triple glazed window not having a free flowing amount of air around it, because it is trapped between two other panels of glass, the temperatures around it can increase and cause some problems. The solution for this problem would be to use a toughened pane at the center of the unit which would inevitably enhance the cost again.
So, we’ve answered the question to is it possible to increase thermal effectiveness by using a triple glazed window. Maybe, but what will it cost? With energy costs increasing by double-digit percentages yearly, it is a consideration that should be earnestly calculated.

Double Glazing Nottinghamshire can supply and install double glazing windows and doors with stained glass for customers in Nottinghamshire

The Nottinghamshire situated corporation has been functioning in the windows industry for donkey years and has a generally accepted service executed by experienced window specialists. Call 0800 246 5843, or visit, for more information on our products.


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