Documentation ift Special Show R+T 2015

Datum: 28.02.2015 | Download: Fachartikel (PDF) | Autor(en): Prof. Ulrich Sieberath, Dipl.-Ing. (FH) Jürgen Benitz-Wildenburg | Kontakt: Inga Schöne

"More than light and shade!"

Modern buildings today can no longer do without high-performance solar protection or glare shields and daylight control systems. The systems play an outstanding role for the utilisation of healthy and natural daylight, as
well as for living comfort, safety and health, and they must become an integral component of a modern building shell in conjunction with window and facade systems. With the advanced development of window, facade and glazing systems, the integration of solar protection/ glare shield and daylight systems is not only becoming increasingly better, but also more demanding. This provides excellent opportunities of doing sustainable business for competent manufacturers.


If the design and erection yearn for energy-efficient buildings, but even energy-related refurbishing, the requirements of physical construction-related characteristics of solar protection products have also become stricter. The EnEV, too, demands verification for protection against summer heat in Articles 3 and 4. This is why, apart from the resistance to wind loads, even the total energy transmittance gtotal for the combination of glazing and solar protection as well as the additional thermal resistance R have been specified as mandated characteristics in the new product standard for exterior shutters. These must be tested and verified, and then specified in the construction product declaration (CPD) and in the CE mark.


The gtotal value is not the only characteristic of solar protection, but it must always be considered together with the glazing. Incidentally, this also applies to the reduction factor Fc. Hence, the manufacturers should specify the gtotal value with the associated glass combination in order to enable meaningful building planning and design. This is particularly true of complex glazing with large-area designs and structures. For this purpose, the gtotal value can best be determined with the help of the calorimetric measurement method. ift Rosenheim has all necessary measurement, testing and simulation methods at its disposal to support the manufacturers for determining the parameters required for wind load, gtotal and R. This is also applicable to the input data that is necessary for the calculation, for example, the degree of solar radiation transmission and reflection as well as the degree of light transmission and light reflection.


The complete text incl. pictures is available for downloading as PDF file.

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