In addition to energy savings that new, modern windows bring to the building, there are other advantages: New windows not only help to keep the heat in the house in the winter and outside in the summer. . At best, they protect against burglary (security) and also ensure that noise from outside does not penetrate the interior (soundproofing). The opening mechanisms for ventilation are often more convenient with modern windows than with old windows.
These are reasons enough that, when taken as a whole, speak in favor of replacing old windows that do not or only partially have this functionality. It depends on the priorities that the landlord sets and the legal requirements that he has to comply with. The law specifies U-values for windows, i.e., limit values for how much energy a window is allowed to let out. And even a g-value, i.e. an energy transmittance for solar radiation inward, is prescribed.
If the old windows no longer comply with the statutory energy saving regulations, it is time to act. Especially when the landlord is obliged to save energy. Single pane windows, according to the general advice, are a reason to replace windows. If in doubt, seek advice from a specialist who will check the quality of the old windows on site.
Measures to replacing old windows
Functional old windows with two or more panes including coating and gas filling, however, can sometimes continue to be used and renovated from the point of view of energy efficiency.
Replace sealing tapes of old windows
One measure that is worthwhile with all old windows is to replace the sealing tapes, which allow air to pass through the space between the frame and the window sash. There are even video instructions for this on the Internet.
Change window handles
As windows get old, the window handles also wear out. They practically wear out and no longer close properly. Here, too, you can easily have the window handles replaced. However, this should be done by a specialist.
