Abstract: A sandwich panel assembly for refrigerated and non-refrigerated structures has an insulating layer disposed between two facings. A chain having hooks or a wire is attached to the facings and is entirely embedded in the insulating layer for positively connecting the faces together. Cable or strapping may be used in place of the connecting or wire. A thermal insulation prevents thermal short circuits from a facing through the chain or wire.

Abstract: Walk-in coolers for maintaining a chamber at a temperature are assembled from sandwich panels, which are welded together in end-to-end abutting relationship. Each panel generally has an inner metallic facing and a spaced opposed metallic facing with the space between the facings filled with a thermal insulating organic material having a coefficient of thermal conductivity of less than 0.3 Btu/hr,ft.sup.2,.degree.F./ft. The abutting ends of the inner facings are welded together to cover the crevices between the inner facings and to fill the corners between mutually perpendicular facings. A heat conducting member having a coefficient of thermal conductivity greater than about 0.3 Btu/hr,ft.sup.2,.degree.F./ft is disposed in the insulating material in contact with the inner facing adjacent the welded abutting end.

Abstract: A composite panel assembly for walk-in coolers and freezers and similar structures has a thickness of low strength insulation sandwiched between two facings. A reinforcing structural member is bonded to the insulation side of one of the facings and extends across at least about half of the thickness of the insulation but is spaced from the opposite facing. The reinforcing member does not provide a direct thermal path between facings; thus preventing condensation on the facing during high humidity and/or low temperature conditions.