Insulating unvented cathedral ceiling
I bought a house with a vaulted ceiling. Drywall is nailed to 2×6 roof rafters. It is unvented for the most part. I have no idea what kind of insulation is up there. I want to insulate it but don’t want to tear off the roof (which is relatively new), or the ceiling. There are big overhanging eaves that can be opened to look up into the cavities. I’m wondering about my options here. Is it possible to spray closed-cell foam up from the eaves and fill the space? Any suggestions?