Exterior insulation with steel studs and foil-faced drywall

Hi, I’m looking to add exterior insulation to my 1960s ranch. (Climate Zone 5) My 2×4 exterior wall assembly:- Fiberboard- Steel stud- Cavity insulation (fiberglass)- Foil-faced drywall- Latex paintI’ve read that… Hi, I’m looking to add exterior insulation to my 1960s ranch. (Climate Zone 5) My 2×4 exterior wall assembly:- Fiberboard- Steel stud- Cavity insulation (fiberglass)- Foil-faced drywall- Latex paintI’ve read that…Read MoreGreenBuildingAdvisor