The heat transmission of old windows with single-pane glazing is very high. The heat transfer coefficients required by the German Energy Saving Ordinance can only be achieved with multiple-pane insulating glazing.
The Uw value (heat transfer coefficient) of single-pane glazing is Uw=5 W/m2K, for high thermal insulation glazing Uw=0.8W/m2K. The heat loss of single-pane glazing is about six times greater. Also by replacing older multiple glazing, heat losses can be reduced by approx. heat losses can be reduced by about three times. For windows, the GEG specifies the heat transfer coefficient (Uw=1.3 W/m2K) as the minimum requirement.
Windows are exposed to particularly high building physical loads. In the event of damage, all constructions such as frames, glazing, anchoring, and fittings must be checked for damage.
Thermographic images can show the heat losses of windows well.
Windows in good condition should be maintained for economic and ecological reasons.
The existing single glazing can be replaced by multiple glazing if necessary.
Window sills can also be the cause of damage to windows.
Moisture penetrates through cracks into the lower parts of the frame and leads to rotting if the moisture continues to penetrate.
Damaged window sills must be replaced by new ones.
Open joints between the frame and the outer wall can lead to rotting and mold growth.
Leaking joint construction materials must be replaced by sealing tapes.
Windows are essential components of architectural design.
The overall impression of the building is largely determined by the arrangement in the facade and the arrangement of the windows.
Windows that are listed and need to be replaced can be reconstructed with special craftsmanship.
Folding or roller shutters, blinds, and awnings can provide heat and light protection for windows.