A standard method of constructing the walls/ roof/floor for many coachbuilt motorhomes. The sandwich for a sidewall is usually of an aluminium or glass fibre exterior, backed plywood interior and insulation filler such as Styrofoam
Found on http://www.encyclo.co.uk/local/20699
Panels composed of a lightweight core material to which two relatively thin, dense, high strength faces or skins are adhered. Found on http://www.encyclo.co.uk/local/20829
Construction produced like a sandwich. The core and sidewalls are sandwiched between the structural layers. Directs more energy to the edges and keeps power loss to a minimum.
Found on http://www.encyclo.co.uk/visitor-contributions.php