It isn't the amount of insulation that you add to the home that accounts for the heat loss, it is the amount of glass in the home. I have 6" in the walls, and 1" of rigid foam additional on the outside of the walls, 12" in the attic spaces. The thermal imaging camera shows the house is as tight as it could possibly be, but the windows are the real culprits of the heat loss in my home. All glazing is Andersen High Performance windows and none of them have any leaks, but you just can't stop a certain amount of loss through the glass. If I had my way, there wouldn't be a window larger than 12" x 12" in the house. The smallest is 3' x 5', and the largest is a 8' high 28' wide wall of glass. Almost forgot to mention the 7' sliding glass door and the 3 giant skylights. Needless to say, I would never build this house again!! Curtains help to keep the heat in, but the wife hates curtains and loves daylight. I like curtains. We don't have curtains on anything but the bedroom, because she likes it dark for sleeping. When you are living in the woods, you don't have to worry about people looking in the windows, but you do have to contend with large energy bills. /forums/images/graemlins/frown.gif /forums/images/graemlins/frown.gif /forums/images/graemlins/frown.gif /forums/images/graemlins/frown.gif