Molded thermoplastic roofing tile

A plurality of interlocking thermoplastic roof tiles for covering a pitched planar roof surface, each tile comprising:

• (a) an elongated thin top wall formed with a plurality of corrugations defining domed ridges the wall having a lateral upper marginal extremity, a lateral lower marginal extremity, a first longitudinal edge and a second longitudinal edge, said upper marginal extremity defining a shelf configured to, when mounted on such roof surface, angle downwardly therealong and away therefrom to form a predetermined angle relative to said roof surface;
• (b) such tile having at said lower marginal extremity a overhang spaced from such roof surface so that each such plurality of tiles will overlap the upwardly facing top wall on the first longitudinal edge, having an elongated upwardly facing pocket defining a trough and on the second longitudinal edge an overhang flange such that laterally adjacent tiles, being complimently configured, permit the flanges and troughs of laterally adjacent tiles to overlie one another, said tile further including;
• (c) a support grid under said top wall and formed with a plurality of vertically extending longitudinal, diagonal, and transverse wall segments terminating at extended edges in a common plane with the roof for supporting said top wall from said roof surface and disposed at said predetermined angle relative thereof;
• and,
• (d) said top wall shelf having a plurality of upwardly opening socket means and in said overhang having a plurality of flange means such that the flange means of such plurality of tile may be received complimently in the socket means of longitudinally adjacent tiles when installed on a roof.