Abstract: A method of insulating an electrical switch/outlet/fixture box installed in an exterior wall comprising a plurality of vertically extending studs, a first insulating material disposed between the plurality of vertically extending studs, a water vapor barrier extending over the first insulating material, furring extending horizontally over the first insulating material and a finishing panel attached to the furring, using an insulated box, the method comprising the steps of making an opening in the water vapor barrier adjacent to one of the plurality of vertically extending studs; introducing the insulated box into the vapor barrier opening; introducing the electrical switch/outlet/fixture box into the insulated box; and attaching the electrical switch/outlet/fixture box and the insulated box to the one of the plurality of vertically extending studs.