I’ve been thinking a lot lately about foundations. Why concrete beneath my feet comes to mind while six men pound away at replacing our roof, I don’t know. Perhaps it’s the racket these heavy-footed, nail-driving enthusiasts are making. With no attic space to buffer their blows, it sounds like they’re bringing the house down. Fresh nail pops have sprouted in our walls, pictures hang at a slant, and a security sensor dangles by its wires from the ceiling upstairs. Even our cat