Insulation fix on existing cathedral ceiling
We bought a house last fall in northern Wisconsin. Thought it would be carpet and countertops, then move in. It has become a gut job. I have many irons in the fire, but I have had to do most things on my own, since all the good contractors are busy until next year.
My current dilemma is the T&G ceiling in the great room/ loft area. We need a new roof, and my energy audit guy said I should get spray foam from the top down since we need a new roof too.
Now, with all the trouble trying to find a spray foamer, I am thinking….
1 Cut out the existing T&G
2 Pull existing rodent infested FGlass
3 2 inch blocking to the sides of the 2 x 12 with existing 1 1/2″ added to top of cord to support 1/2″ plywood baffles to ridge vent.
4 Seal bottom and top of insulation cavity with plywood
5 Caulk for airtight seal
6 fill with R38 batts
7 2 layers of foil 2 side polyiso, offset with joints taped
8 1×3 vertical during strips to put on new T&G
With the cost of spray foam and the ripping off of roof sheathing to do it, oh, and remove the existing can lights from above, this plan seems doable, I just need scaffolding.
My biggest question, besides how crazy I already am, is if the inner foam makes sense to get the added r value and vapor seal to dry out instead of in.
The second picture is also a problem. This is the master off the great room. I am putting a flat ceiling in there soon, and the great room will not have continuous ventilation from the soffits there. The other side of the great room is similar. How should that be done best?
Thanks for your time.
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