The crew hears from Ben Bogie about his experience using foam glass. Several listeners weigh in on the ethics and sensibility of a 9000-sq. ft. deep-energy retrofit. Jeff talks about who inspects structural steel in Seattle. Jeff wants to know what he should do about his cobbled-together basement slab. Michael asks how to fix a stucco-clad wall built partially below grade. Andy from Indy wants to know the best way to insulate a concrete floor that was once part of a porch. And anonymous wants to know what to do about the Insulbrick on an old home he's rehabbing.