A clear view: seasonal optical distortion in the insulating glass is a thing of the past 21 January 2019 Back to news index

Innovative component ensures pressure equalisation in double and triple glazing during the seasonal changes in climate

A clear view: seasonal optical distortion in the insulating glass is a thing of the past

Buildings with glass façades and big windows attract attention – that is when a homogeneous appearance is critical. One common problem is caused by insulating glass that bends inwards or bulges outwards and disrupts the building’s overall appearance. SWISSPACER, manufacturer of the warm edge, has a solution for this: the SWISSPACER Air. The small component ensures pressure equalisation in the insulating glass during the seasonal changes in climate.

And even in buildings with differences in height of 300 metres between the top and bottom floor – as are becoming increasingly popular in several major cities – the SWISSPACER Air can counteract the risks of a distorted look of the glass.

Furthermore, parallel panes are important for heat insulation – particularly in winter. SWISSPACER Air prevents seasonal bending in when air contracts in the area between the panes when it gets cold. That way, the insulating glass can continue to provide its full level of performance even during colder times of year.

Yet the SWISSPACER Air also provides for safety during transportation and in terms of the timely planning of building sites. Why? Because when transporting insulating glass across areas with vast differences in altitude, for example through mountain passes, tunnels or during air freight, there is no pressure equalisation between a sealed piece of insulating glass and the outside atmosphere, resulting in considerable tension at the edges of the glass and inside the glass itself. This can cause damage to the sealant at the edge of the glass – or even breakage.

Valerian Wicky, Managing Director at Glassolutions Kreuzlingen – the leading manufacturer of glass for construction and a subsidiary of the global SAINT-GOBAIN Group – is well aware of this issue: “When deadlines had to be pushed back on the building site, it turned out time and again that the insulating glass had cracked during the interim storage. Our clients were demanding a simple yet flexible solution that could react to weathering, transport options and building progress according to the situation at hand. Now, thanks to SWISSPACER Air, all this is no longer a problem. As soon as the corresponding building section is ready, the window manufacturer can install the units of glass directly in the factory and transport it to the property, for example in the mountains. Since then, architects and construction managers have no longer had to worry about additional handling or double transportation of glass and frames,” said Wicky.

Since 2016, Glassolutions has already carried out projects with SWISSPACER Air all over the Swiss Alps. For example, in the chalet in Riederalp in the Swiss canton of Valais, where all the windows in the building were renovated and equipped with the Air. There, the glass had to be transported by mountain railway: With a difference in altitude of 1166 meters above sea level and a journey time of nine minutes, there was a climb rate of 130 m/min in altitude – no longer a problem with the SWISSPACER Air.

 

The spacer bar – small component, big impact

With the SWISSPACER Air, the manufacturer of warm edge spacer bars is expanding its portfolio. The spacer bar in double glazing keeps the glass panes a certain distance apart and therefore defines the width of the area between the panes that is both insulating and filled with gas.

The warm edge spacer bars from SWISSPACER – in contrast to the usual spacer bars – are not made of aluminium or stainless steel, but rather from a highly insulating composite plastic material. The warm edge therefore prevents cold bridges and heat loss at the edge of the pane of insulating glass – and thus leads to lower energy losses, a better living climate and prevents the formation of condensation and mould. With SWISSPACER, up to 8 percent can be saved on heating costs, as proven by a recent study by the Passive House Institute.

With 17 colours, SWISSPACER offers the largest selection of warm edge spacer bars and thus enables architects to optimally coordinate the colour of the spacer bar with the window frame. The velvety and matte finish prevents disturbing metallic reflections from incidental sunlight and is thus also important for the design in aesthetic terms.

The video about SWISSPACER Air can be found on our website: http://www.swisspacer.com/en/video