Remove roof vent when replacing roof on a spray foamed roof deck?
Almost 15 years ago we were one of the first people in our area to use spray foam, and used open cell foam in a cathedral ceiling. Closed cell foam was available, but at that point it was hard to find information about the pros and cons. At that time, the County where I live required us to put in a ridge vent despite me telling them that it was not necessary. Now we need to replace our roof and I am curious to see how the roof and insulation performed, especially since we have a solar system installed on top of it with a bunch of penetrations. My question is, do you think that we should remove the ridge vent while re-roofing, or if it the roof seems solid in that area, would it be better to retain the ridge vent? If we remove it, should we install some type of air barrier and insulation in that void or a vapor permeable material? Maybe rigid foam with spray foam around it?
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