This building system has become quite frequent in recent years. This flooring is laid on open porticos, namely floors built on a building's load-bearing pillars. Despite the fact that this building system is widely used, it gives rise to several problems, among which the major thermal dissipation and low temperatures that this type of floor is exposed to. Great attention is hence needed when building a structure like this and, in particular, excellent thermal insulation needs to be applied on the outer part of the building. Said insulation must also be highly resistant to compression, as it must bear a part of the structure's weight. Extruded polystyrene is the thermal insulation that ensures both characteristics and is appropriate for this type of application.