Abstract: An elongate metal furring strip for an insulation system for attaching cellular insulation to a masonary wall having the strip formed in a general U-configuration. The metal strip has an integral spacer so a fastening portion of the strip is elevated above the surface of the insulation sheet providing for a dead air space when a finishing panel is attached to the strip. In the preferred embodiment, the spacer comprises a filler of insulative material extending between the legs of the strip.