I have a rigid metal exhaust pipe coming out of the bathroom fan over my downstairs bathroom. It goes up at approximately a 30 degree angle for about twenty feet and stops just before it gets to the side of the garage, where it points, open, at a screen that seems to be mostly sealed (I don't know if this is how my attic over my house is supposed to be; I trusted that my roofer knew what he was doing). There are joints about one/third and two/thirds of the way up the pipe. The top third of the pipe is dry. At the highest of the two joints, there are a few drops of water, that I'm sure are being formed by condensation, then running back down the outside of the pipe, to soak my fiberglass insulation and then drip down through the bathroom fan while it is on.
My questions are these:
Is this an immediate repair job, or can it wait until I have a week off in February? Could it wait until summer (when it will be warmer for me or the condensation won't(?) be occurring)?
What would be involved in the repair? I'm thinking I'd need to replace any wet insulation, check the integrity of the drywall that forms the ceiling for the bathroom, and seal the pipe (somehow). Are these accurate and what haven't I thought of?
3 -- What is the proper way to vent the end of that pipe out of my attic with that side vent (I wish I knew proper terminology, sorry; I'll try to get some pictures up here to help)?