Hi to all.
Here is another source for roof leaks that sure surprised me. I needed to clean the screen in the roof fan in the shower on an A/S land yacht 30 M/H. had to remove the screen which is dedious. But discovered deserted nests form bees or some other flying pests in the foam bead insulation. I asume that they got in when the vent was open. Also discovered that if you leave your shower vent open when it rains that water can get in, leak along the luan and drain in your closet which is next to the shower. Seems like when they installed the vent that the piping was too short leaving a gap. So close the vent when not using the fan is the recommendation.