Exposed insulweb/blown cellulose?
Follow up to my recent attic questions.
I’m considering building baffles out of 2″ GPS foam that go from top to bottom spaced 1.5″ from the , but rather than putting batts below it, I’m thinking it may be easier to fur down 10-12″, staple insulweb to the bottom, and blow as much cellulose in there as I can.
My question is, in the space behind the knee walls, would it be acceptable to leave this assembly exposed or would it need a facer of some sort?
Is there a better way to hang insulation that’s thicker than the rafters that’s vapor open? Layers of foam with staggered seams is easy to do but I’m worried about trapping moisture, and the cost/labor adds up. At some point a few inches of open cell blown over the baffles starts to look preferable.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part