We have used this assembly before in special cases, like a Western house with full exposure to the setting sun, and some northern homes on the Great Lakes- on the lake side. We find that it adds little in initial cost, while increasing energy efficiency, wind and tornado resistance, seismic resistance, and simplifies wiring during construction. Obviously this must be done at the time of the initial design, and manufacturing stage. In construction, the outer wall is carried up four feet, the Thermax is inserted, and then the inner wall is brought up, as here: