I keep trying to think of how to explain this so it is not confusing! But yes, it is going in the window schedule. It is for the actual construction of the building and purchasing of the windows.
Great idea to look into the macros. I thought of using a custom field but am not sure I want to manually enter information on so many windows that may have to be changed, it's nice to have the program features that change based on the width/height entered.