Our son has a business in which he sells and installs replacement doors and windows. They, of course, are the type of doors and windows that are beautiful, sturdy and new. These doors and windows are meant to keep things out of a house. Quite often they are installed and never used. Their purpose is to increase the value of the house, look new and pretty, and save energy. All good things, sure. But what about the old door? What happens to those old windows? I am one of those people who love…