I live in the American south, have some friends in the upper midwest. One of the friends recently built a new house, he used ICF (insulated concrete blocks) fo

I live in the American south, have some friends in the upper midwest. One of the friends recently built a new house, he used ICF (insulated concrete blocks) for the exterior. They're supposed to be super efficient and super strong. I'm looking around to see if they are as helpful in hot weather as they are cold.