Zone 4A knee wall assembly question – GreenBuildingAdvisor

Assuming that my knee wall is very well air-sealed, will the following assembly still risk condensation in the heating season: 2×4 wood-framed knee wall, exterior sheathing is just foil-faced (both sides) polyiso foam board (no osb or plywood), R15 rockwool batts, 1/2″ drywall, latex paint. It seems like there’s a risk of condensation forming on the interior foil face of the polyiso board in the heating season, but this assembly is no different from the code required exterior wall assemblies for 4A except that there’s no exterior OSB or plywood sheathing. Thank you for any comments.