Going to the soffet is 12 feet.
Venting bathroom fan through roof.
From up on the roof use a jigsaw or reciprocating saw to cut a 4 in.
Behind a soffit vent.
Robert s has the largest base flange of any bath roof vent cap which makes it super easy to install and make watertight on the roof.
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Behind a gable vent.
From the roof find the nail and use the utility knife to cut roof shingles from around the nail.
Choice is go up to roof 5 6 feet or out the present vent 15 18 feet with insulated pipe or shorten the line by going straight to side of home but this requires going up high with latter to drill a new vent hole as tight quarters in attic prevent drilling from attic.
From inside the attic drive a nail through the roof directly above the bathroom vent fan.
It is because of this that many builders tend to advise against this method.
Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof.
Center the nail between two rafters.
No need for special tool.
This involves running ductwork from the fan usually though an attic and out through the roof.
Start in the attic and drill a hole through the roof in the desired vent location.
Options for venting a bathroom exhaust fan include best to worst.
Through the roof or an exterior gable wall.
Leave the drill bit sticking through the roof so you can find the hole.
Try to keep it close to the fan location.