An upstairs bedroom (just below attic) has paint peeling. I initially thought it was due to moisture from the humidifier we occasionally run. Today I looked in the attic and noticed the spot turns out to be directly under a circular attic vent in the roof. Because the attic is not finished (has no floor, just beams with insulation in the spaces between the beams), I did not crawl over to the spot to inspect it closely, but I wonder if the peeling paint could be due to moisture from the vent. Anyone with experience on this. How would you further assess -- from inside the attic or from outside by looking at the roof vent? Thanks!