A few years back I saw an episode of this old house where they were taking old sashes and cutting a slot around the outside edge and installing some kind of weatherstripping. I'd like to do the same to the windows in my old farmhouse but I have never seen any details about how to do this or where to get the materials. We like our old windows because many of them still have the bubbled glass. I'm really not interested in replacing my windows because there are 28 of them and the cost isn't in my budget. I would certainly be willing and able to tighten them up though. Thanks for any help. Rick