Exterior Insulation with recycled polyiso?
I’m considering the ins and outs of using recycled polyiso for some or all of the 4 inches of exterior insulation on a residence in western MA. The recycled polyiso is roofing insulation with a felt or paper facing. I’d appreciate thoughts on taping the seams and holes (from prior mounting); that is, how important is this if I place the air barrier at the sheathing (with house wrap between the sheathing and foam board). The foam will be attached with 1×3 strapping (rain screen) and long screws followed by cladding attached to the strapping. Any thoughts, cautions, experiences etc. are welcomed.