Add an exhaust fan to bathroom without exterior wall or roof access

bathroomvent

My master bathroom is wired for a fan, but I opened it up and found that it is just venting into the joist between the ceiling and the second floor.

There are no exterior walls to access in the bathroom. Also the joist runs to the main house in one direction, and to a back room in the other.

The back room has the end of a hip roof over it, but I don't think there is any access into the roof section.

So I think the only option would be to bring a vent down the joist, through the wall into ceiling of the back room and out through the roof. Is something like this possible without completely cutting up the ceilings and the roof?

I'll probably have a pro look at it, but how much would something like this cost?

Best Answer

Without seeing the house I cant tell you. It sounds like you are talking about creating a soffit which is going to be alot of labor.

You have some other options. If this is just a 1/2 bath you can but a vent-free vent that uses a charcoal filter for smells. If there is a bath then you can get a small dehumidifier.

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