Houses are built for long periods of time. Nevertheless, individual components have to be refurbished or modernized over time. This is especially true for windows. Most homeowners replace windows every 15 to 25 years on average. We have summarized for you in this guide what you need to consider when modernizing windows.
Not all windows are the same
If you browse the real estate offers or even drive carefully through the area, you will quickly notice that houses in particular from all decades of the 20th. Century, and less often even from the previous centuries. Windows in particular are elements that are explicitly located in the 20th. Century have developed massively:
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- Early 20th. Century to the 1950s: single glazing
- 1930s to 1960s: double single glazing (two casements one after the other)
- 1960s to 1980s double windows that can be opened but are one double glazed window
- 1970s to 1980s: double glazing with vacuum
- 1980s to 1990s: insulating windows with vacuum or inert gas filling
- since the 1990s: thermal insulation windows, absolutely airtight and gas-tight, with vacuum or gas filling
- Window inserts and cemented window panes
The older a house is, the more likely the windows have already been renovated and modernized. There is a clear difference between quite old, leaky and newer windows: window putty is no longer used to glaze windows. Rather, modern windows are more like modules that are double or triple glazed. A metal frame runs around it that fixes the window panes and seals the gaps airtight. You can find out more about the window structure here.
Modern thermal insulation windows and traditionally built houses
There can be a problem with modernizing windows if the windows are to be replaced in existing houses. Even into the first decade after the turn of the millennium, the usual construction method was still relevant: Windows that are installed with assembly foam and are not 100% airtight, plus a cold roof for further house ventilation. Modern thermal insulation windows are absolutely gas-tight and therefore airtight.
When modernizing windows, install according to RAL
If these windows are installed after the window and door assembly according to RAL, a blower door test quickly shows that the house has an absolutely tight shell. This is particularly important for low-energy houses. These houses are designed completely differently. Instead of a cold roof, there is a warm roof and a white basement tub instead of the usual black tub. The thermal insulation windows too, of course.
When installing modern thermal insulation windows, do not forget the house ventilation
Particularly important: a separate ventilation system is integrated. If there is no additional house ventilation installed (usually with heat recovery, etc.).), moisture cannot escape either. The air humidity condenses in the cold spots and mold growth occurs very quickly. So if you want to modernize your windows, the first thing to consider is that you choose the right windows.
There can be a lot wrong or. not modernized to match
Of course, the window seller will tell you about the enormous savings with current thermal insulation windows. But he probably doesn't even know about the construction of your building. To do this, you absolutely need a specialist who can tell you under what circumstances modern thermal insulation windows can be installed or. what the alternative to that is.Tips & Tricks Installing windows in modern windows is very easy. First the glass or window bead is removed from the inside and the sealing joint cut out on the outside. Then you can take out the window module. When inserting the new window, make sure to block the window professionally.