Abstract: A roof tile adapted for flat-packing includes on its under surface at least one region spaced from the or each hanging nib where the tile is deeper in cross-section than any other part of the tile. The underside of the or each region is configured so that when the tile is superposed on a second said tile, the tiles lie parallel and the underside lies in substantial contact with the upper surface of the second tile and prevents the hanging nib(s) of the first tile from contacting the upper surface of the second tile. By creating a region that is deeper than the depth at the hanging nibs, no load is borne by the nibs during stacking and the risk of the nibs breaking off during stacking and/or subsequent transportation is significantly reduced. In addition, because the tiles are specifically adapted to be flat-packed, the packs are particularly stable.