[red86yota]

I'm adding a bathroom upstairs, and am trying to find a good place to vent the fart fan. The entire upstairs is a cathedral ceiling that is going to have spray foam insulation - so no roof vents. As such, the soffits are not venting into the non-existant attic space. Is it OK to vent the bathroom into the soffits? The soffits will be perforated.

thanks

 

[rizzo]

exhaust fan vents to fit the 4" ducting typical in this application are available that install to the soffit. These vents ensure the exhuast air exits external to the soffit - not into the soffit structure, which given the warm, moist air's propensity to rise would ensure wet and moldy decking and rafter tails. Ice dams would also be a concern if in a northern climate.

Does the cathedral ceiling assembly provide sufficient thickness to pipe the air to a roof penetrating vent?

Vents of both variety are available for inspection at any big box store.

 

[Wildie]

In some cases a roof vent is easier than a soffit vent! If you have a truss roof you will be OK! However, if you have a stick framed roof, like mine,there's little space to run the pipe between the top wall plate and the roof sheeting!

 

[johnnyboy]

I used soffit vent along with stick built roof, it was tight, had to flatten the pipe a little bit but it works

 

[Termite]

Going through the soffit is fine, but the vent must terminate to outdoor air and must not be just dumped into the soffit itself.

 

[red86yota]

thanks everybody...i need to go hunt down some soffit vents that will work for me.