Exterior Insulation Thickness
I was all set to order ZIP R12 for my current project but I’m having a hard time pulling the trigger. Seems like just as much of a hassle to install compared to doing foam over standard zip. Probably ends up being more expensive too. I also can’t seem to wrap my head around the sheathing still being on the exterior of the foam….I know I’m not the only one. That said, does anyone know off hand or can point to an article that gives the minimum exterior insulation thickness and type for a zone 6 climate? I prefer to put most of my insulation budget to the roof assembly.
2×6 walls, standard R21 unfaced batts, zip sheathing, Foam?, 3/4″ rain screen, wood & corten standing seam siding.
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