Window between precast concrete basement and timber frame house?

Hello,

I have a basic question. Currently, our stairwell, which is located in the northeast, does not have a window. According to the current plan, it should only be indirectly illuminated by the light in the hallway or entrance. At the moment, we have floor-to-ceiling windows at the beginning and end of each flight of stairs. However, since we occasionally worry, sometimes more, sometimes less, that it might be too dark and that the light would almost always have to be turned on, we are now considering adding windows between the landings (split-level staircase). The window would probably run between the floors, which in our case consist of precast concrete (UG) and timber panel construction (EG). After searching for a long time, I have not found any examples, but I fear that because of the different materials and thermal expansions, installing a window in between is not entirely unproblematic. What do you think? Is this concern justified, or are we worrying unnecessarily and this is completely common nowadays?

rdwlnts

The window would then probably run between the floors, which in our case consist of precast concrete (basement) and timber panel construction (ground floor). Even after searching for a long time, I couldn't find any examples of this, but I fear that due to the different materials and thermal expansions, it is not entirely unproblematic to install windows in between.
What do you think? Is the concern justified or are we worrying unnecessarily and is this completely common nowadays?

Physics doesn't follow any fashion. I see your concern as justified and you won't have found any examples because that's why it's avoided. But I also see no reason or even obligation to make such a window continuous across the transition – just make two separate ones stacked on top of each other.

Ok, thanks for your assessment and confirmation. I have always had reservations about such a window; a GU with whom we negotiated for a very long time once sent us a draft like that. It was not requested by us, but he said he would strongly advise us to do it, otherwise it would be "pitch dark" in the stairwell. However, he also seemed unable to get it into his architectural program without tricks. It just looked faulty. In any case, because it also seemed generally strange to me, we did not pursue it further. Now, however, despite larger windows in the hallway, it seems that not enough light is reaching the stairwell.

If one stayed within the concrete part, one would end up with a narrow window at floor level. Well, I don’t know if that looks very nice. Windows are basically located on the side of the stairs. A long, horizontal window in the wooden part would be relatively high to be able to look out from the landing. Possibly the window would start around 1.6–1.7m in height. Sure, light would come in nicely that way. But from a somewhat higher position, you could look out. I’ll think about it and continue drawing in this direction. Merci