Originally Posted by Kelly M Bray
The problem is that it is a tile roof making any modifications difficult. The contractor who did it is out of business I believe. Another covered all the soffit vents with Styrofoam molding and stucco. I get to find them from inside the attic as they are not visible from outside. The customers have a limited budget. I think first steps would be to open the soffits, then vent the bathrooms, then check with a roofing contractor about venting higher up.
It may make it difficult but its not impossible. Tile Mfg make venting ridge tiles. If you don't open both intake and exhaust you will not gain any air movement, you have trapped air.
I think you are correct to first vent the bath exhaust because of the introduction of additional moisture to the trapped air space, but properly venting the attic should not go without out addressing that issue. Make sure if you vent to the soffit that you vent through and not just to the sofit area, you want the moisture sent outside the house envelope.
Now, even if your customer has a limited budget, they need to find a way to correct this, because the potential for long term problems created by this will be a LOT more expensive to correct than making the resources available now to resolve these issues.