So, our bathroom fan leaks when it is cold. In the attic, the PVC pipe connected to the exhaust is uninsulated, and frosted -- shock!
So, my question is, what is the best way to fix this? Do I cut the PVC pipe, and run an insulated wrapper around it? Or would there still be issues?
Should I leave some sag in a section of the insulation I add so that any moisture will drip there, and later evaporate?
I'm kind of wondering if I am overlooking something as the other ducts are insulated. Of course, they don't leak.
Here is a picture of the situation in the attic: