Non vented cathedral ceiling with standing metal seam roof underlayment ?

I am building a non vented cathedral ceiling based on guidance from GBA. 2×10 with cellulose,1/2 cdx taped, 1.5 “ EPS, 1/2” cdx, then x underlayment and standing metal seam… I am building a non vented cathedral ceiling based on guidance from GBA. 2×10 with cellulose,1/2 cdx taped, 1.5 “ EPS, 1/2” cdx, then x underlayment and standing metal seam…Read MoreGreenBuildingAdvisor