An article for mounting to a support structure via a fastener-includes a molded body made from a first thermoplastic material. The molded body has a length. The molded body also has an attachment surface spaced from the support structure and a show surface opposite the attachment surface. The article also includes a fastening insert made of a second thermoplastic material and disposed within the molded body for receiving the fastener to mount the article to the support structure. The fastening insert has a flange extending along the length of the molded body. The fastening insert also has a boss coupled to and extending from the flange and the attachment surface for receiving the fastener. The flange defines a plurality of holes with the first thermoplastic material disposed in the holes for anchoring the fastening insert in the molded body.