When stained glass windows are exposed to various weather conditions and other influences for more than eighty years in a row, material fatigue occurs: binding putty loosens and lead profiles deteriorate, so the entire stained glass structure sags. Due to cracks and broken glass, it is necessary to carry out restoration work. Before any interventions, stained glass windows must be photo-documented in detail, then carefully dismantled and transported to the workshop. In the workshop, the condition and damage of the stained glass windows are documented again. An impression of the segments of stained glass and lead mesh has to be taken. The glass segments are separated from the lead profiles, carefully washed in a suitable vessel and cleaned from the layers of dirt.
The cleaned parts of the stained glass are reassembled according to the print and documentation. The glass pieces are replaced with new ones only if the extent of damage is such that it is necessary. Lead profiles are additionally protected with a layer of tin. When installing restored stained glass windows, it is recommended to additionally protect them with glass panels on the outside of the building.
Protective glass is specially made for certain requirements, i.e. for weather protection, energy conservation, protection of historically valuable windows from pollution or aggressive environmental influences, prevention of water condensation, protection against damage due to vandalism, etc.
With this system of protective glazing, we improve the thermal and sound insulation of the window, which ultimately increases the quality of the project and ensures the longevity of the glass. Protective glass can be made in various simulations of antique clear glass or even semi-transparent structured glass that changes the optics and eliminates the reflection effect of the window. The glazing would then be finalized with tempered or laminated glass, depending on project requirements.