A process for producing a structural laminate comprising the steps of providing a composite article comprising a facing sheet adhered to a thin, substantially incompressible yet expansible mat of long, layered glass fibers, applying a foam-forming mixture to the glass fibers, positioning a second composite article or a facing sheet over the applied foam-forming mixture, passing the facing sheets having the mat and the foam-forming mixture therebetween through the nip of two rotating rolls, and foaming the foam-forming mixture. The structural laminate is useful in thermal insulating applications.