Fix for Unvented Cathedral ceiling issue
Hello. I previously wrote about my cathedral ceiling which was insulated incorrectly. We are in 4a and have an unvented cathedral ceiling with no vents and also no spray foam or rigid board. Just fiberglass. We will have condensation issues if we don’t fix the problem. We can’t add ventilation as we don’t have room on the eaves to do so and it doesn’t make sense for how the ceiling was done
To avoid taking down the ceiling that’s there (it’s a bedroom) and spray foaming, we are debating using blow in cellulose and doing it though the roof sheathing from outside. We have a large space under the sheathing (between sheathing and fiberglass). The finished assemble would be an unvented cathedral ceiling that would have cedar shingles, cedar breather, tar paper, sheathing, blown in cellulose, finger glass (Kraft covered to the inside ), Sheetrock and then the shiplap that’s already there. We are thinking of maybe added a ridge vent as well.
do you think this could work for a fix? It’s defiantly not a typical suggested unvented roof assembly but I have limited options now.
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