Bathroom fan exhaust location

Brent H.

Looking for opinions on where to exhaust bathroom vent fans. Currently, the fans vent under the soffit. Doing some reading, this may not be optimal since there is a continuous soffit vent under there as well which would allow some of the damp bathroom air into the attic. I’m currently replacing the soffit and fascia so now is my chance to move the vent. Only alternative seems to be the roof as this could be done when my

roof is replaced which will happen soon. I have mixed view on adding more holes to the roof and concerned if snow will cause issues or if I’ll end up with icing. I don’t see any signs of mold in the attic from the current vent location.

Thoughts from the pros?

Thx.

ChrisJ

I have one coming through my roof and in 12 years I've never had an issue with snow or anything else.

However, we use it often, multiple times a day and my roof has a decent pitch of 8/12.

How steep is your roof?

Can you run them out a gable side of the house instead?

Regardless of what route you take, it's best to pipe them using rigid pipe and as little flex duct as possible. It will probably also be beneficial to insulate the piping.

mattmia2

If you have enough snow to warrant it there are roof vents for bath fans that are raised to extend above the snow. I would have little concern about a quality roof mounted vent leaking. The only minor issue is that they need to be painted occasionally because they are usually steel.

Larry Weingarten

Hi, A thought is just to block the soffit vent near the bath exhaust. That way you avoid any roof concerns, and losing a few feet of soffit vent likely will have no impact.

Yours, Larry