Summer cabin retrofit
We bought a 70’s tongue and groove cathedral roofed cabin in Meyers Ca. I think the winter is a region 5. The current shingles are unfortunately in too good a shape to tear off but ultimately i will put 6″ of cc foam and a cold raised seam roof with some sort of screen to prevent spark entry. I have spent the last 60 days of spare time addressing the down slope water issues by installing a french drain and water proofing the foundation and removing the mostly fallen fiberglass from under the 4′ centered beam crawl space. Battling the mice, rats and the idiots who rolled out a half assed vapor barrier over the top of the detritus and rats nests. We are now clean and I have fitted two layers of 1 1/2 cc thermax with a openable 5″ cap for termite inspection. I am adding 3 1/2 inches of thermax to the stem wall cavities and 1 1/2 to the rim joist and will then spray foam with 1″class i fire retardant cc for air sealing. I also threw in a piece of drain tube to set up for a radon remediation system if the radon test comes back positive. The new vapor barrier will hopefully be tight enough for good suction. Any comments or suggestions would be appreciated
The next phase i would like to insulate the exterior. The current system from the outside is 1/2 sheathing, 31/2″ fiberglass batts with kraft paper, drywall. There is no wrb. So i would like to add 2 layers of 1 1/2 cc and strapping and cedar siding. My question is what wrb and i guess the rigid foam if taped is the air barrier and will i be running a risk of trapped moisutre . I dont think this area is humid even in the summer. We may convert to a gas stove which i am have some thoughts about for winter humidity generation. Again, thoughts and comments are appreciated.