I would like to re-side home in the next year, I currently live in Minneapols, Mn and my walls are quite cold in the winter time. I have some type of brown fiber board under my cedar shakes and very little insulation in the walls, I only assume due to wood peckers and fixing the holes from time to time when they appear.
If and when I re-side my home can I take all of that fiber board off and insulate the walls from the outside, put up plywood sheets and wrap it for warmer walls in the winter? Can I use regular insulation, or does it have to be something special or can I not do that at all?
Basically I would like to insulate my walls, can I and how to do it from the outside if possible?