A molding arrangement for creating a recess when casting a building part for connecting the tensile reinforcement element to the building part, with the molding arrangement including at least one molding element (2) to form the recess (5) as well as at least one anchoring element (3) for the creation of a form-fitting connection between the building part and a filler material to be introduced into the recess. Additionally the invention provides a building element for thermal insulation between two building parts having the molding arrangement. And finally a method is disclosed to connect a reinforcement element to a building part.