A frame is mounted to a front surface of a previously mounted mirror so that recesses in the back side of the frame receive protruding portions of fasteners which attach the frame to a supporting structure. Guide structures are temporarily mounted to the front surface of the mirror to facilitate the mounting of the frame to the mirror. The guide structures are used to suspend the frame in a position forward of the mirror. Then, while the frame is suspended by the guide structures, the frame is pushed toward the mirror so that the frame slides along the guide structures. As a result, adhesive strips, which are mounted to the back of the frame, engage the front surface of the mirror and become adhered thereto, so that the frame is mounted to the front surface of the mirror by the adhesive strips.