no vent in the soffit and no room to install same
youre in a tough situation,
this problem would have been best fixed during a reroof - as so many roof issues seem to be - but I'm assuming thats not an option here.
to achieve pass thru venting, one less desirable option is to drill holes thru the fascia board that the rafters are attached to - one hole per rafter.
The fascia board will be weakened with so many holes so a judgement call has to be made - how big can the holes can be, how exposed to the weather will the hole be, structural buttressing to make up for the weakening etc...
Good carpentry instincts are needed for this or even a strucxural enginner.
Then you gotta ask yourself if you really need to add soffit vents.
Are you experiencing high indoor humidity or mold, frost in attic, pent up moisture in attic? You may or may not. Some homes are drafty enough that humidity levels never get a chance to get high - even without an active venting system.
Even without soffit vents, the ridge vent will still work to a point and that may be enough. Not ideal of course, as the ridgevent may actually be pulling interior air and exacerbating air leaks and stack effect.
If you can keep the indoor wintertime humidity levels at 35% or lower, then youre fine - though again, not the ideal solution. Without reroofing, compromises like this are common, especially with cathedral/flat roof type assemblies.
Last edited by rodeo; 02-14-2011 at 11:51 AM.