Quad-Lock Building Systems has released the Extra Panel, which is designed to provide insulation value to concrete walls up to R-84. The panel increases the continuous unbroken layer of insulation surrounding a structure and optimizes the thermal mass of concrete by placing a thick layer of insulation on the outside of a concrete wall. The panels are added in one or more layers behind the exterior panel of any Quad-Lock ICF wall during construction. quadlock.com; 888.711.5625.