AnalySing If Triple Glazing Is A Superior Concept That Double Glazing, Is An Important Task At Double Glazing Northumberland In Northumberland. The idea that larger is better, has pushed the domestic window market in the UK for a long time. The thickness of double glazed windows has varied over the years, from around 20mm to 24mm, and then settling on 28mm, despite 24mm being the ideal size for thermal capacity.

Thanks to the idea that bigger is better, the borders go from 60mm to 70mm without an actual technical advance

The new question being asked is, are triple glazed windows better than double? Is three really better than two? ( The answer to this question is not as simple as you may think. The Difficult Aspect Of It, As Always, Is In The Detail. To be able to properly answer this question, we need to take into account the personal aspects of a proposed Insulated Glass Unit (IGU).

Currently, the industry standard for a double glazed window it on 4 mm pane of low E (low emissivity) coated glass, one pane of 4 mm plain annealed glass, and a 20mm cavity of argon gas, giving it a make up of 4 – 20 – 4

This will give you a centre pane u-value of 1.1 W / kilojalores per metre squared. If we bring in a centre pane of plain glass but maintain the total thickness of the unit at 28mm (i.e. 4-8-4-8-4), we attain a u-value of 1.2 W / kilojalores per metre squared – a less appealing performance compared to the 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. To get to a u-value of 0.9 W / kilojalores per metre squared the thickness required is 44mm (4-16-4-16-4). Improvements can further be made by introducing a second low E pane where the unit U value changes to 0.6 W/ M Sq. K. .

On the surface, going from 1.1 W / kilojalores per metre squared to 0.6 W / kilojalores per metre squared in terms of heat loss seems like something worth paying for

The Window Energy Rating Scheme which has been widely accepted as the industry standard to judge thermal performance and also been subscribed into Building Regulations calculates solar gain along with heat loss. . This implies that the triple glazed unit’s enhanced heat loss qualities are greatly nullified by the reduction of heat produced by the sunshine.

Although Low iron crystals which offer a better visibility than the regular crystals could be a solution to have a better solar gain

Triple glazing purveyors have to take another aspect into consideration. This problem relates to cracking in the panels of the glass due to the increased thermal stress. The centre pane of a triple glazed unit does not have any air movement around it because of the encapsulation the temperatures can reach higher than can be expected for double glazing. . To correct this, use a toughened pane at the middle of the unit, this will unavoidably raise the cost again.
Therefore the answer to the original question will be that it is indeed possible to improve thermal performance of IGU by having triple glazing. Maybe, but what will it cost? With energy bills rising on an average that goes into double digit percentages each year, this is something that needs to be taken into account before making a decision.

Northumberland can enjoy an excellent service of installation of double glazing windows and doors wioth vents thanks to Double Glazing Northumberland

This Northumberland based company has experienced professionals that have been in the window industry for years that can provide this popular service. Visit or call 0800 246 5843 today to learn more.


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