This system, which can be used in all areas where high energy savings are desired, is a joinery system in which internal and external aluminum profiles are mounted together with insulating Epdm gaskets to provide thermal insulation. In the areas where these systems are used, the inner surfaces of the heat-insulated joineries do not get cold thanks to their high insulation properties, thus preventing the condensation of water vapor and preventing sweating. In addition, a high degree of thermal insulation can be achieved by choosing the appropriate glass.