I have a old stone house which is about 90 years old and is made from the stones that were in a old stone wall which runs on our property. The living room has cheap wood paneling which has been painted white, perhaps covering the original plaster and lathe walls. Needless to say, the house is not insulated very well. In one large exterior wall there are two large 5 foot windows which I need to replace. Since this exterior wall is made of stone, i would like am considering taking off the cheap wood paneling and having the raw stone of the wall as the interior. We live in NJ so it does get cold here. I have no idea how messy the inside side of that wall is. Would this be a big mistake heat-wise and should I just leave it?