I have done many handyman projects but I have questions about a project that I have intended, namely to insulate some well-made single glaze windows. This is a mobile home and I have replaced all the original crank out windows with insulated ones. The glass in the windows of question is set in about 3/8" from the frame surface so my intent is to have glass panes cut about 3/8" larger than the opening. I then would use a hair dryer and warm both the original and new clean glass panes, place a bead of silicon caulk around the perimeter and then quickly install the new glass. Any ideas about how this might work out?