You need to take a nail and you are going to drive it right through the roof sheathing through the roof shingles and it will stick up.
Exhasut fan vent through roof.
Most bath vents for homes are 3.
In all cases the ducting needs to conduct the exchaust to the building exterior and needs to terminate in an animal proof vent cover.
The best way is to mark with nails in the middle of the rafter bay.
Step 1 first we must set a mark of the vent hole.
Each fan vents separately out the roof.
Therefore i should take a more direct route to vent the fan right out through the roof.
Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot.
I recommend replacing the vent pipe with insulated vent pipe.
I see many questions about leaking bath exhaust vents.
This article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl space.
Two bathrooms two roof vents each bathroom has its own exhaust fan.
Vent your bath and kitchen exhaust fans through the roof through a special roof hood.
Next make sure you have one of the new roof exhaust vents on the roof and properly sealed.
Both bathrooms are vented by a single in line fan that has one exhaust vent running through the roof.