From inside the attic drive a nail through the roof directly above the bathroom vent fan.
Install a roof vent for exhagust fan.
Exhaust fans mounted on an exterior wall vent directly outside without any ductwork required.
Ceiling mounted fans typically use ducts hidden in the walls ceiling or attic to reach a safe exit point on the roof or a wall.
The duct should vent to the outside.
Nail the lower corners with roofing nails and tar the heads.
Choosing a whole house fan.
Slide the vent under the shingles so they cover the top half of the vent flange.
Then use a screw to secure the duct connector to the edge of the hole so that it will line up with the exhaust on the fan housing.
In this video this old house general contractor tom silva shows how to properly install a roof mounted bath fan vent.
Be sure to install the duct in the position specified by the instructions so the housing will line up correctly.
Center the nail between two rafters.
From the roof find the nail and use the utility knife to cut roof shingles from around the nail.
Install exhaust fan on flat roof by saum hadi posted on february 17 2020 dia keepa vent an aluminum roof attic ventilation flat roof exhaust vent hood range cap roof roof vents for proper attic ventilation exhaust vent hood range cap roof.