What is the best way to super insulate the exterior of our 1975 four level split home?
...exterior. First, the siding is in excellent condition and is the masonite type that was fairly common in the that time period. We want to run horizontal 1 by 2 strapping about 24 inches apart top to bottom on the exterior. Then on top of that put vertical 1 by 2 strapping screwing this strapping into the vertical house...