From: Speedy Jim 
Newsgroups: misc.consumers.house
Subject: Re: Plumbing the bathroom vent to the outside (retrofit job)
Date: Tue, 27 Dec 2005 21:01:05 GMT

Rick F. wrote:

> Hi all.. I've got a house that has two bathroom vents and are currently
> venting into the attic.. I'm in the Southern California area so it doesn't
> get too cold (compared to other parts of the US) so I don't have any concerns
> about ice dams, etc.. However, I'd like to fix this problem and soon.
> 
> We've got a concrete (think of tiles -- next best thing) roof consisting of
> tiles about 14" by 12" or so and I'm currently thinking of finding a way to
> pop a hole (3" or 4") through one of the tiles (in the center) and using
> some sort of roof vent to allow the breathing.. I'm currently thinking that
> the flexible pipe currently venting into the roof might have to get 
> transitioned over to ABS or PVC before popping through the roof.. 
> 
> Are there any other options you can think of and is the above sufficient?
> I'd rather not pop through the stucco if at all possible as I've got very 
> little room to do so and it would be major work in doing so.
> 
> TIA!
> 
> -- Rick
> 
   Bad idea, IMHO.  Too much risk of roof damage, plus sealing the 
opening will be iffy.  And will need a rain cap over the pipe.

   There are special roof vents made for this app but they require
removal of several "shingles" to make watertight.

   Go thru the stucco or a soffit or end wall; any place but the poor roof.

Jim