Americans have a very skweed view of what apartment living is actually like, in part because the construction of such buildings in America (outside of the ultra-luxury market) is generally terrible. Lumber is abundant in North America and cheap so everything is timber-framed, which is awful for noise. I actually do not understand how people can live in two-story houses in the US. Such people complaining about noise s…
You have a very incorrect build of what modern American construction is like. Yes it is mostly timer-framed, but we have fire codes which means walls are not as thin as you seem to think. Sure if you look at an apartment built in 1950 your summary is valid, but that isn't done anymore. 5 over 1 refers to section 1 and section 5 of the building code and not the number of floors built for each. It is coincidence that w…
thick concrete walls might as well be hypothetical, theoretical building material given how much not expensive it is, and thus how much rarer it is.