E04C 2/243

Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products laminated and composed of materials covered by two or more of groups [CPC: E04C2/12], [CPC: E04C2/16], [CPC: E04C2/20] {one at least of the material being insulating}