Glass for Monuments

A new insulation glass with mouth-blown external pane creates more leeway for the energetic upgrading of listed buildings.

The installation of new windows or modern insulation glazing in listed buildings is linked with a series of conditions from the relevant monuments administration and is completely impossible in many cases. The usual single glazing considerably impairs on the residential comfort in historical building structures and causes energy consumption to soar. The efforts of the preservation order to maintain the character of old buildings with original windows often encounters little approval against this backdrop and often leads to controversial discussions between the house owners and monument conservators.

Fruitful Cooperation
A new insulation glass with traditionally manufactured external panes is now creating new room to manoeuvre in this sensitive area of use. In cooperation with the monument protection authorities, the Glashütte Lamberts glass works and insulation glass manufacturer Glas Zange have developed insulation glazing with mouth-blown external panels, which satisfy both the demands of improved heat insulation and the monument preservation orders. According to the two companies, which are both based in Bavaria, the stylish solution is an important step in monument preservation.

Generally speaking, all window glass was mouth-blown until the end of the last century. To do this, a glass cylinder is initially blown out and then cut open and ironed into a glass panel. Glashütte Lamberts is the only manufacturer in Germany to preserve the traditional manufacturing of flat glass using mouth-blowing, thus ensuring the character of historical original window glass. The properties of the manually manufactured panes correspond to the glass which was common at the beginning of the 20th century. With Glas Zange, which is based in Weiden, Lamberts has found a competent partner to integrate the mouth-blown glass into state-of-the-art insulation glass.