Abstract: A composite panel for use in the construction industry includes a core of foamed plastic material and a skin on at least one of its faces comprised of a two-ply material consisting of aluminum foil bonded to a mat of randomly oriented glass fibers into which the foam core has been expanded.The core material comprises the rection product of isocyanurate and polyester/polyether polyol with the isocyanurate in sufficient excess to form trimmer rings and to react with the polyol to form urethane linkages.Panels formed of the core material and the two-ply skins have excellent thermal insulation and fire retardant properties and the skins have excellent mechanical strength.

Abstract: Apparatus for fastening building construction insulating panels to a supporting wall structure comprising a slotted channel member and an anchoring clip. The channel has flanges by which it is secured to a supporting wall structure and a slotted mounting surface spaced from the supporting wall a preselected distance to provide improved insulation. The anchoring clip has opposed flanges on one end for engaging the edges of adjacent insulating wall panels and an anchor on the opposite end for engaging the slot in the channel and thereby holding the insulated panel to the supporting wall with the preselected spacing.