Hi all:
Windows In the pioneering time were small mainly because of the proceedure of manufacturing glass.
Glass was also very expensive and was mainly destined to be used in your first attempt at building a shelter or home. Sparingly at first with small lights (panes)and then as time went on mainly towards the end of the 1800's glass panes became larger, and more abundant.
The early 3 bay Barns had virtually no windows, and you wouldn't find any in the doors.
Many windows in a home meant that person had accumulated wealth, and It would show in their homes usually, at least here in Ontario Canada.
I hope this helps understand alittle the early use of glass in the pioneering homes
NH