moisture found on exterior wall during bathroom remodel
I'm in the process of demoing an old shower/tub combo and installing a shower. I noticed some moisture behind my vapor barrier on the exterior wall of of the room. It wasn't a lot, and it didn't seem to have soaked through the insulation that I removed to troubleshoot. Is it possible it was just humid air coming from outside meeting the conditioned air of my house? My house is 100+ years old so drafty walls wouldn't be much of a surprise. (We also just ended about a month of near daily rain). The space that was damp is in front of an old window frame that the previous owners covered with a piece of plywood, then insulated over.
my gut reaction is to tear off the exterior wood siding of that section of wall and re-side it, but if I don't need to I'd rather save the expense. This remodel is already way behind the schedule I gave my partner two years ago...