Have you discovered that your home does not have insulation in the exterior walls. We can drill a 2" hole toward the top of the wall and fill the wall cavity between the studs with blown cellulose or fiberglass insulation. We can drill either on the inside or the outside of the wall.
We will put a concealing plug back in the wall, which you can paint, wallpaper or panel over. You will be more comfortable all year round and it will reduce your heating and cooling bills.