I redesigned the door on my house. For those of you that don't know, I bought one of those 2 story storage buildings that looks like a barn, and converted it into a house. The door that it came with, was good for a storage building, but sucked for a house. I cased in the opening with one by stuff, put in a strip for the door to seal against, made a door with paneling and 1" x 3" lumber. Now I can insulate the door!