Reinforced polystyrene board with two metal meshes connected by spacers made of electro-welded galvanized steel wire. This panel is used for load-bearing walls, partition walls, and external enclosing walls. The structural or covering layer is applied using the Spritz-Béton system. The panel can also be used horizontally to create small roof structures with appropriate steel reinforcement and concrete coating. It is important to note that there are different types of single-layer panels. Some are suitable for load-bearing structures, while others vary in polystyrene density and thickness, as well as steel wire diameter, depending on specific requirements (partition walls, sound insulation, enclosing walls, thermal insulation, etc.).