You might want to go to Walmart and see if you can find the heavy duty plastic that is in 100 ft rolls. I would wrap your whole house other then the doors of course... Even if you put plastic on the inside windows you still will probably have drafts. You might want to check into blowing insulation in the walls too. We are going to do that in a month or so. This can be done by you and your family and doesnt need a contractor to do. Go to your local Home Depot or Menards or Lowes and I bet they can help you out. Jenn