For simpler production of a waterproof, decorated wall, ceiling or floor panel with improved quality, the invention proposes a process involving the following steps: provision of a panel-shaped carrier and a non-woven fabric, application of an adhesive to one surface of the carrier or to a surface of the non-woven fabric, lamination of the non-woven fabric by means of the applied adhesive to the surface of the carrier, impregnation of the non-woven fabric with a liquid means, hardening of the impregnating agent, application of a sealing layer as a liquid composition and hardening of the sealing layer and/or application of a top layer as a liquid composition and hardening of the top layer.