Abstract: A planar roofing made of folded metal sheets which comprises a plurality of metal sheets in which two nonadjacent edges are complementarily folded or otherwise shaped so as to allow the coupling of two adjacent metal sheets by partial overlap, and a plurality of supporting retainer blocks which can be anchored to a purlin for the roofing. Each supporting retainer block comprises a base portion for resting on the purlin and two lateral parallel raised portions that rise from the base and are individually externally flanked by a respective recess which is meant to accommodate a fold which is provided proximate to, and along, a folded edge of a respective metal sheet.

Abstract: Modular roofing panel comprising a substantially flat or corrugated or fretted body, two opposite longitudinal profiled edges. One of the edges has a continuous leg inclined with respect to the body so as to rise above the top of the corrugations or frets, and defines, at its own base, a drain channel. The other edge extends in an overlapping fashion so as to cover, in use, the leg and the respective drain channel of an adjacent modular roofing panel to delimit therewith a drain duct.