Panel and method for the preparation thereof

A composite synthetic resinous foam panel, the foam panel having at least first and second generally opposed major surfaces, the resinous panel comprising a plurality of expanded multicellular synthetic resinous thermoplastic particles, the particles having a density of from about one-half to two pounds per cubic foot, the synthetic resinous thermoplastic particles being generally encapsulated within a matrix of a resole resin foam, the resole resin foam having a bulk density in the interstitial spaces between the synthetic resinous particles of from about two to six pounds per cubic foot, an expanded glass in particulate form encapsulated within portions of the resole resin foam disposed adjacent the major surfaces of the panel.