Abstract: A tile assembly having a plurality of tiles adapted to join in an interlocking and repeating fashion. A plurality of tile assemblies are joined to each other, forming a roof with a streamlined look. Each tile assembly includes left and right center tiles laterally spaced along matching edges. The tile assembly includes upper and lower tiles of the same configuration as the center tiles, fitting over and under, respectively, the center tiles. Each tile has repeating patterns laterally spaced to each other and contiguous along matching lateral extents. Each pattern consists of a generally diamond shaped main surface with vertically spaced apices and laterally spaced apices. Two upper flanges extend upwardly and outwardly each pattern's main surface, along the upper edges, joining in an upper flange apex. Two lower flanges extend downwardly and outwardly from each pattern's main surface, along the lower edges, joining in a lower flange apex.