Would be less back pressure if ran straight up thru roof, but that invites
other probs of making a leakproof penetration *after* roofing is applied. I
would therefore go with a standard soffit vent - with 1/8 or 1/4 inch
screen to keep out vermin - for that size of vent duct. Leaving the duct on
the soffit vent is pointless, and just pumps warm moist air directly into
the attic space. This is really a no no. Could be, this was not the
intention of the builder, and someone else was supposed to complete the job,
but never showed up, or job was unsupervised. You might compare notes with
homes built at the same time in your neighborhood.

"Rob" wrote in message
...
Hello,
I was doing some cable fishing in my attic today and I noticed that
two of the bathrooms on the second floor have their exhaut fans
terminating in the attic. Actually the end of the exhaust duct is
laying on the soffit vent. Is this proper under most building codes?
The attic has good ventilation with the soffit and ridge vents. But I
am still not happy with what the builder did.

I was thinking of using a wall cap and cutting a 5''x5'' hole in the
soffit and venting it this way as opposed to putting another PVC stack
thru the roof. Has anyone tried this before and is it any better than
what the builder did?