Insulating an exposed cement wall
Zone 4 NC build, on a steep slope which requires some foundation trickery. One spot I have a question about is the exposed portion of cement wall that is between lower level living space and the air space beneath the garage(garage is on steel beams). See the attached pics. The plan was to do 2″ foam board around the entire lower level cement foundation areas(inside). Will that be enough in this spot when you account for the 2×4 wall + the additional insulation inside that wall or should I do thicker foam along that wall since it will forever be exposed to air?