Triple glazing: the weight burden

2012-10-20 | Glazing / Insulating Glass

Increasingly tighter requirements on heat insulation by law, and constantly increasing energy prices are driving forward the trend towards triple glazing in architecture. A constructive opportunity to counter the associated increased weight of glass is presented by the use of thin glass.

At glasstec 2010, with a 18 x 3.3 metre triple insulation glass pane (10/18/10/18/10), insulation glass manufacturer Henze Glas showed the glass dimensions that can be realized
Glass is an ideal material for application in building envelopes. The transparent material can be used in a variety of applications and – irrespective of the type of finishing – fulfills individual functions. Modern insulation glass offers reliable heat insulation and solar protection, prevents high noise pollution and also, if required, corresponds to the highest safety levels. In addition, individual design highlights can also be achieved through the use of glass. The elementary functions of glass products in the building shell also include heat insulation. In view of the increasingly tighter legal requirements placed on architectural heat insulation and the rising energy prices, in recent decades the glass industry has been continually further developing its products and has achieved considerable improvements in efficiency.

Increasing requirements
The limits of physics can, however, not be overcome even with the use of perfected glass formats and highly functional coatings. In the case of double (insulation) glazing, which has been used over decades, the limit has already been reached with a heat transfer co-efficient (Ug-value) of 1.0 W/m2K. To satisfy the current heat insulation requirements by law, this value is absolutely sufficient, but not for future requirements. According to the European Union Energy Performance of Buildings Directive - EPBD), which came into force in 2010, as early as January 2021, only “nearly zero-energy-buildings” are to be erected in the pr...


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Article taken from Glass-Technology International bi-monthly magazine (6 issues per year)
Year: 2012 number: 5
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