The window was a self-made construction by the first owner. Unfortunately, just a steel frame with broken glass set in concrete. Thermally and in terms of tightness, a disaster.
We thought for a long time about whether it could be preserved somehow. In the end, it became a new window after all. A proud 8 weeks delivery time from an online retailer in Thuringia and produced by third parties in Poland (which you don't find out on the website). It is a Rehau Synego Classic, triple-glazed.
After the experiences in the basement, we did everything ourselves.
Removal

Installation
We still have to plaster outside provisionally until next year when the other two follow and the grille can also be removed.
Recently the windowsill arrived, so now the missing plaster inside can be done.
