Abstract: An improved building panel is disclosed comprising a foam core having bonded to opposite sides thereof an outer skin or cover plate. The outer skins are bent along the two longwise edges thereof and receive a wooden edging member therebetween, the edging member being bonded to both the outer skins and the foam core. The edging members are preferably tongue and groove, i.e., having a tongue construction along one longitudinal edge of the panel and a groove construction along the opposite longitudinal edge of the panel. The tongued edging has a plurality of latch means disposed therealong while the grooved edge has a plurality of matching latch pins disposed therealong, said tongue and groove construction and latches and latch pins enabling a rigid connection between adjacent panels. A superior panel is produced that avoids delamination under extreme conditions. The bond is produced by a two adhesive system.