I have a really weird problem. I have a bedroom wall where the paint kept bubbling and peeling off. I have re-textured and painted it several times. I finally ripped all the drywall off and discovered that there is a large space behind the wall that has all the plumbing for two adjacent showers. The problem is that those pipes changing temperatures are causing enough moisture to build up in the space that the adjacent drywall gets wet and will not hold texture and paint. I checked for any leaks because it seemed weird to have that much moisture from the existence of pipes.
The question is: Is there anything that I can put in there when I close it back up to reduce the moisture? Would a vent work? A piano dehumidifier? A combination of the two? I would rather not have a random thing plugged into the wall.
EDIT: There are some really good answers so far, but I think I need to better explain. Here is the set up:
I tried spraying down the roof and looking for leaks. I tried turning all showers and flushing all toilets. There is no water coming from anywhere. The vents go straight to the roof. There is some insulation in there so I hate to just put an HVAC return register on it, but that and insulating the pipes looks like the only option.