Also... what does "much more solid" windows mean exactly? Like, are you saying European window glass is... thicker or something? Which wouldn't make any sense, and I'm not even sure what a benefit would be?
Unless someone has some actual comparative statistics, the idea that European windows are somehow more "solid" than North American ones isn't at all obvious. I've spent years living on both continents and never noticed a huge difference. What matters the most is simply the age of and investment in the building, not which continent you're on.
[1] https://www.dwmmag.com/survey-multi-pane-windows-now-on-59-p...
Even 80-90 years ago, brick housing in wester Europe was made with walls of two layers with an air/insulation cavity inbetween. Current practices usually don't use clay bricks but aerated concrete [1] which has great thermal insulation, plus insulation layers on top.
> what does "much more solid" windows mean exactly
Triple-glazed windows with well-insulated frames, rather than single-pane push-up windows that leak heat like a sieve. Massive difference in thermal and acoustic insulation.
[1] https://en.wikipedia.org/wiki/Autoclaved_aerated_concrete
Bricks are quite common in Europe, at least for buildings up to a certain height. The resulting buildings here (in Germany) offer higher living quality with better thermal and acoustic insulation than a typical North American beams + drywalls building. That's just an observation though and maybe the general construction method is not the cause - maybe it's just because our windows and doors are much more solid.