The Bathroom Vent That Didn’t
In the bathroom, the vent seemed to be working fine. However, upon looking in the attic we see the vent is not exactly doing its job.
The large black coupling at the top of the foto should be connected to a duct pipe to evacuate the moist air out of the bathroom and out of the attic space. Instead, it is dumping humid air into the insulation beside it. This will create a perfect environment to grow mold (moisture and warmth).
The sad part is that the exhaust duct was just to the right of the picture. Had the vent been installed 180 degrees around, it could have been fine.