We once lived in a house that had been a model home, which means that every room was wallpapered. And they did not size the walls when they put it on either. The only way we got it off, without having to peel it off in one inch pieces, was to ALMOST boil water, and put it in a clean yard sprayer. My husband got on a ladder and sprayed that hot water from the top of the wall up by the ceiling, and sprayed it down. We'd wait about 5 or 10 minutes and it would come off really well. If you do this make sure you put towels on the carpet under where you spray. We also had one of those little thingys that you roll over the wallpaper and it poked holes in it, which made the hot water penetrate even better. Good luck to you that job is the worst!