It is freezing in my basement so I decided to re-insulate my daughter's bedroom. I removed the old paneling walls to find that it wasn't insulated! There was a water barrier and a heat shield. My problem now is winter is almost here and the framing is 1x1's. I don't have the money to redo the framing. Do I use rigid foam board cut to size to fit the holes and spray insulation around that and cover with water barrier? Can I just spray insulation all over and cover with dry wall?
Please tell me there is something I can do, without having to take down the frame. I am taking about the outer wall and I live in Quebec Canada so it gets pretty cold.