We had some more (relatively light) rain and today I found some water drops and a tiny puddle under the front street side of the fantastic fan trim. I took off the trim and couldn't figure out where the water was coming from.
After feeling around, I realized it appears to be coming from between the two metal sheets that make up the lower part of the ceiling. The roof sandwhich is basically:
Code:
metal sheet
metal sheet
foam
metal sheet
metal sheet
So I think I'm seeing:
Code:
metal sheet
metal sheet
foam
metal sheet
(water/dampness here)
metal sheet
So it's wicking around in the sheeting. Based on other threads, and seeing how robust the caulking as on the vent I am removing, I wouldn't be surprised if the water is actually coming in from the center seam in the top of the front shell.
I also removed the trim around the AC unit and observed the PVC boards used in supporting it have cracks. I felt no moisture there but I'm going to leave all the trim off and observe when it rains (or get the hose out if it doesn't rain today).