Venting Bathroom Fan Through Roof

In this video this old house general contractor tom silva shows how to properly install a roof mounted bath fan vent.

Venting bathroom fan through roof.

Behind a gable vent. Going to the soffet is 12 feet. Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. It is because of this that many builders tend to advise against this method.

Try to keep it close to the fan location. Center the nail between two rafters. From inside the attic drive a nail through the roof directly above the bathroom vent fan. No need for special tool.

Behind a soffit vent. This involves running ductwork from the fan usually though an attic and out through the roof. Leave the drill bit sticking through the roof so you can find the hole. See below for a shopping list and tools subscribe.

Start in the attic and drill a hole through the roof in the desired vent location. From up on the roof use a jigsaw or reciprocating saw to cut a 4 in. 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. 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.

This old house general contractor tom silva shows how to properly install a roof mounted bath fan vent. Options for venting a bathroom exhaust fan include best to worst.