Abstract: The improved sandwich panel of the present invention includes inner and outer panel faces that have a foam core integrally bonded therebetween by the hardening and curing of a liquid foam during the manufacturing process. The faces of the preferred panel embodiments are composed of cement-fiber boards and/or cement-woodchip boards. The preferred sandwich panel has a male projecting lateral edge on one side and a female recess in the core on the opposite side edge.The preferred method of manufacturing the panels includes the installation of the male edge member prior to foaming and the utilization of edge recess forming members installed at the edges of the panel assembly prior to the insertion of liquid foam therebetween. The removal of the edge recess forming members following the curing of the foam easily creates the edge recesses.