On some areas the industry is used to demand insulation slabs with ventilation grooves for sandwich panels, when on other areas they can choose products without the grooves. In both cases the porous stone wool insulation helps the concrete sandwich panels dry quickly.
Often simple concrete panels are delivered from the manufacturer with pre-installed insulation. This speeds up the later work on the construction site by many means. For example, the heat can be put on earlier and it’s possible to minimize scaffolding need to get the envelope closed. This way of working suites well for both ventilated and rendered facades.