If your neighborhood is like mine, most of the houses were built by the same
developer around the same time. As such they all share certain details. In
my case most single story houses vent through the roof as well as second
story baths but first story baths vent through the wall. Some baths with
windows have no vent at all.

I think the preferred method it to do whatever is easiest and still satisfy
code which says the vent must be a certain distance from any window or door
openings (this may also include soffit vent openings but I am not sure) and
a certain distance from property line. (sorry I don't recall that distance).
I believe back draft prevention device is also required (a flap)

Regardless of location, install vent pipe all the way to the outside.





"MP" wrote in message
...
I was wondering if someone could enlighten me. In all that I've read about
bathroom exhausts, most of the time it talks about using the soffit to
exhaust the vapour.

However, I talked to a friend and he said to avoid that, because it builds
moisture under the endge of the roof. I'd be better off with a roof vent.

Could someone please give me some feedback on this?

TIA