Abstract: A roof tile fastening arrangement secures each of a plurality of concrete roof tiles, disposed in side-by-side relation, to a birdstop mounted adjacent the lower edge of a roof support structure, by a plurality of clips extending between and secured to the side edges of the tiles and to the birdstop. Each of the clips has an upper curved lip portion extending over the side edge of an associated one of the tiles. In a first embodiment, each of the clips has a lower hook portion which hooks to a different one of a plurality of drain slots adjacent the base of the birdstop. The clip is made of resilient material and has a curved body portion which may be flexed to facilitate installation of the clip and which then assumes the curved configuration to hold the clip in tension between the side edge of the associated tile and the associated drain slot in the birdstop.