Special loads for insulating glass

Radiators in front of glass

A minimum distance of 30 cm must always be observed between radiators and insulating glass behind it. When using thermally toughened safety glass as the inner pane of the insulating glass, the minimum distance can be reduced to 15 cm. It is recommended to ensure that the radiator and the insulating glass are the same width, as this leads to a more uniform heating of the glass. If the above distances are not complied with, radiation protection must be installed.

Sliding doors and windows

When opening sliding doors and windows, an additional space is formed between the glazed elements. If sliding doors and windows are to be equipped with insulating glass using coatings or other glass products that absorb the sun irradiation more intensely, ensure that there is sufficient ventilation in this gap. If sufficient ventilation is not ensured, there is a risk of heat build-up with thermally induced pane breakage. In this case, therefore, the preventive use of thermally toughened safety glass is recommended.

Internal shading

The subsequent installation of internal shading harbours the risk of heat build-up between shading and glazing in sun irradiation. The attachment of the shading is therefore to be done, with regard to the distance from the glazing and to the installation situation, in such a way that heat accumulation is avoided. If it is already known before the implementation of glazing that an internal shading is to be applied there, the use of thermally toughened safety glass may be recommended.

Adhesives and painting on glass

The subsequent application of absorbent foils and colours leads to a strong thermal load of the glass with solar irradiation with the risk of thermally induced pane breakage. If it is already known before the implementation of glazing that such foils and paints are to be applied there, the use of thermally toughened safety glass is recommended in order to reduce the risk of breakage.

Partially shaded glass

An increased thermal load is also generated for glass when one part of the pane is exposed to direct sun while another part is in the shade. Such partially shaded glass is heated unevenly. The stresses in the glass caused by the uneven heating depend, among other things, on the intensity of the sun irradiation, the absorption of sun irradiation by the glass and the geometric distribution of the sunny and shaded glass surface portions. Glass products with increased absorption of sun irradiation are in particular coated and/or volume-coloured glass. If it is already known before the implementation of glazing that partial thermal shading produces strong thermal loads on the intended glass, it is recommended to test the use of thermally toughened safety glass in individual cases in order to reduce the risk of breakage.