They all have a cap over the exhaust opening ... provided the vent pipe rises above the roof by the amount recommended by ...
If you have two bathrooms that are close together and one has an exhaust ... the fan to the vent hood through the roof. Some ...
Larger, more enhanced vents are mounted on top of the roof. These larger vents must be carefully installed as to avoid water leakage or destruction by high winds. The vents must have a cap or hat on .