Wife and I woke up to this this morning. Do any of you have any idea what it is or why it is leaking? It's an upstairs bathroom built against the exterior wall of the house. We used the shower the previous morning and everything was fine. We open the shower this morning and we have this black/dark-brown stuff leaking from the wall.http://ift.tt/2yQbHji help would be appreciated. Thanks! via /r/DIY http://ift.tt/2x7E2j7
