Double Glazing Cardiff Within South Glamorgan Examines The Question About Whether Triple Glazing Are Really Better Than Double. For many years the UK window market has concluded that the idea of bigger means better. 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.

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? ( To understand the situation people will be required also to understand the simple answer as no answer for this question is in sight. . 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 standard double glazing glass unit is composed of one 4mm panel of low emissivity glass, one panel of annealed glass and a 20mm gap of argon gas. (4mm, 20mm, 4mm)

This will give you a centre pane u-value of 1.1 W / kilojalores per metre squared. If we add a centre pane of plain glass but maintain the 28 mm thickness of the unit (i.e 4 -8 – 4- 8 – 4), we get a u-value of 1.2 W / kilojalores per metre squared which is a worse performance than double glazed. But, we can improve the window’s performance by increasing the thickness of the triple glazed unit by making the cavities between the panes bigger. If the thickness is optimized to 44 MM [4-16-4-16-4] will have the benefit of a U value of 0.9 W/M sq. K. . 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. .

When this matter is considered at face value with the improvement which has been observed in terms of heat loss because of glazing from 1.1 W/M sq.K to 0.6 W/M sq. K looks to be like an improvement which is worth paying for

The Window Energy Rating Scheme, generally approved, as the industry level of quality for determining thermal efficiency and written into Building Regulations, measures solar gain as well as heat loss. This provides a clear meaning that the improved heat loss credentials of triple glazing are meaningfully negated by the reduction of warmth created by sunshine. .

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

There is an additional aspect that curators of triple glazed windows much take into consideration. This problem has to do with cracking in units caused by heat stress. 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. They way of fix this is expensive and it is adding a hardened pane in the center of the unit.
Therefore the answer to the original question will be that it is indeed possible to improve thermal performance of IGU by having triple glazing. But this sparks a new questions – at what price? 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.

Double Glazing Cardiff provide and install double glazed windows and doors with perspex to all of our clients in Cardiff

This South Glamorgan based company has experienced professionals that have been in the window industry for years that can provide this popular service. For more information, you are requested to call over 0800 246 5843 or visit .


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