Thank you very much. I'm very glad blasting the stereo was not the problem... I'd hate to get into THAT argument! Regarding watching the crack, what exactly should I be watching for? Should I monitor it once or twice a week? Daily? Several times a day? Also, should I be concerned that the shower stopped hammering or just grateful?
We just moved to the DC area from Southern California, so this is also my first experience with cold weather. The weather just turned cold last week -- could that be why the shower stopped hammering? I don't recall this happening last winter, but so many things were new maybe I just didn;t notice it.