Poorly insulated cathedral ceilings
We have recently purchased a Cape style house. The front (north side) of the house has very narrow 2×6 framed cathedral ceilings. The housing was at one point reinsulated with fiberglass bat insulation and a plastic vapor barrier. We had an energy company come out a do an audit and we decided to have them dense pack the cathedral ceiling with cellulose. And reinsulate the attic with blown cellulose also.
As they say hindsight is 20/20 and we are now looking at other options. First off they have been back multiple times to fix their blunders. They missed the bay closest to the chimney and when they came back to fill it they found the insulation was soaked. Myself and a contractor friend determined that the moisture was from the heating and cooling cycle of the roof being close to chimney and poorly insulated. The company is planning on insulation around the chimney (very tight space) with rockwool insulation and then dense packing the rafter bay with cellulose.
My wife and I are looking for options moving forward. We don’t want to rip the ceilings down in the upstairs of the house. I suspect that the insulation company did not remove most of the old fiberglass insulation because it was not reachable without taking the drywall down.
Our concerns are did the product they sell us really help or hurt our insulation situation? Also I had the following idea to increase our R value on the cathedral ceiling. I want to remove the shingles, replace any water damaged roof sheathing, put 3 inches of foam board over the existing roof sheathing, and build a new roof deck on top of the foam board insulation and shingle.
I come here asking for advise. I am by know means an insulation or building expert, i have a good understand of our situation but would like any possible suggestions to our current situation. Thank you very much.
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