Abstract: A tile positioning device for height adjusting a tile located on a roof hip or ridge joint, each tile having upper and lower faces. The device comprises two opposing longitudinal spaced apart side members arranged for straddling a roof hip or ridge joint, means for maintaining the longitudinal side members in a substantially parallel configuration, and at least one tile-pressing element mounted between the longitudinal side members. The or each tile-pressing element being arranged to act upon the upper face of a tile located between the longitudinal side members, so as to height position the tile relative to the device.