No, if you want to use them professionally, you must remove them beforehand and remove and clean all residues from the wall so that the properties of the calcium silicate board can be fully utilized.
If you still want to install the panels on plasterboard walls (e.g. plasterboard) or wooden panels, you should place a vapor barrier between them so that the plaster or wooden substrate does not become damp. However, it is professional to remove the plasterboard walls and/or wooden panels before application.
However, if you want to use the panels on a wall that has been filled with gypsum plaster, this is possible with our products. It is important that you stay within our product range and use the special primer for gypsum plaster and our special adhesive, as these products are designed to work together.
