First, you made a bunch of the inside wall faces after which drew the rectangles for the home windows exterior the group. Earlier than including the rectangles for the window openings it’s essential open the wall group for enhancing so you possibly can add geometry to switch the partitions. The opposite factor you’ve executed is put the inside wall faces in a bunch inside a bunch that incorporates the outer wall faces. With that association in the event you put the rectangles for the home windows contained in the inside group and push them by way of, the outer faces received’t get minimize. Seems like the simplest factor to do in the meanwhile is to blow up the entire teams, minimize you openings and repair the face orientations. You should not have any uncovered blue faces.
Notice you’ll have some bother with the home windows I present chosen, beneath, as a result of the within and outdoors faces of the partitions aren’t parallel to one another. They most likely needs to be mounted to make them parallel.