I am insulating a shed as a wine cooler. I have house wrap on the outside. I will install unfaced batt insulation between studs. Can I then install foam insulation board under the drywall? I am concerned if the vapor barrier of the Insulation board may cause a double vapor barrier problem?
I am in Northern CA, and cooling the inside. So I believe the vapor barrier on the outside is correct. I just do not understand if the addition on the insulation board with foil will cause an issue.