boon..I read to page 4 last night...great blog!!!...I will follow it. So you used 2" Rmax with foil tape on the seams but this still exposes the internal studs...so you put 1/4" ply over all that as the thermal barrier??? then some sort of polyurethane??? I think I would go to the ply and maybe skip the poly on top???...what do you think. I'm terrified of smells due to chemicals.
Also...since the rmax has foil on both sides and you use foil tape then that is also the vapor barrier? I dont care about looks so I need to compare the 2' rmax to spray in.
I have read there are even soy bean based spray ins? Is the Rvalue the same with spray in?
Since your target was 17-19R...is that good down to zero degrees?
thanks for all this.