Hello,
I am repairing a small section of my three-tab composite roof, and installing a ducted roof vent for my bathroom fan.
What is puzzling me is that in addition to the two holes at the top of the roof vent (which will be covered by the top course of shingles), there are also two holes at the bottom of the roof vent.
If I put nails into these holes, they will be exposed, which is something that I know should be avoided.
Here is a picture of the roof vent:
I'm guessing I am supposed to run the lower course of shingles to where they are butting into the left and right hand side of the section of the vent that rises up from the bottom plate (flange), so that the nail/nail holes are covered by them.
In other words, should the shingles (represented by the mustard colored overlay) cover the flange as in this picture?:
Thanks for any help on this,
Jon