[dylan604]

um, yes? Home building construction crews are not the ones making doors, or windows, or tubs/faucets/etc. They buy them as parts to be assembled into a whole. What did you think that the crews are pouring glass on site into windows, or firing up ceramic glazing ovens to cure the toilets and sinks?

[markdown]

In my country and most others, construction crews make windows and doors just like they make walls and roofs.