It is fascinating to see the differences in construction process from here to there. (I grew up working with/for my dad as a plumber.)
Here the usual process is frame, then outside sheeting, roof, shingles, and windows after those are done. So putting windows in before the sheeting and roof just looks odd to me.
Some folks say we are many different nations in one (not just states bound by one federal system). I can see their point the more I travel or see about the country.