an apparatus is provided for securing a panel to a substrate . the apparatus includes a base member , and an attachment member for securing the base member to the substrate . the apparatus further includes a clip member including a u - shaped member and an angle - sided member . the u - shaped member includes a central portion and first and second walls defining a generally u - shaped access region for accepting the angle - sided member . at least one of the first and second walls includes a longitudinal flange extending laterally outwardly from an upper end thereof . each of the u - shaped member and the angle - sided member includes a corresponding hole for accepting the attachment member therethrough . the apparatus further includes a securing member for pressing the longitudinal flange against at top edge portion of the panel .