Roof forming element for a roof of a building, and roof

A building having a roof, which roof closes an opening of the building, wherein the roof is at least partly formed by a plurality of roof forming elements which each close a part of said opening, wherein the plurality of roof forming elements is supported by a support structure of the building, which support structure surrounds the opening,

• each of the plurality of roof forming elements comprising
• an elongate polymer roof plate having a top plate and a bottom plate parallel to the top plate, which top and bottom plate are integrally interconnected via a plurality of ribs extending in a length direction of the roof plate,
• a beam which is manufactured as one integral part together with the roof plate, wherein the beam extends in the length direction of the roof plate, is located at a first longitudinal side of the roof plate, and protrudes downwards from the bottom plate of the roof plate, wherein the other, second longitudinal side is free from a second beam protruding downwards from the bottom plate, so that the integral combination of the roof plate and the beam has an L-shaped cross-section,
• a cover for at least substantially completely covering the top plate at a distance therefrom, so as to define an interior space between the cover and the top plate, wherein the cover comprises at least one cover element which extends over the entire width of the roof plate and over at least part of the length of the roof plate, and
• coupling means for coupling a first one of the plurality of roof forming elements to a second one of the plurality of roof forming elements, the second roof forming element neighbouring the first roof forming element,
• wherein a second longitudinal side of the first roof forming element is supported by a first longitudinal side of the second roof forming element, so that the beam of the second roof forming element also supports the roof plate of the first roof forming element, and so that the first roof forming element and second roof forming element are flush with respect to each other, and wherein the respective roof plates of the first and second roof forming elements are flush with respect to each other;
• wherein a second longitudinal side of a third roof forming element of the plurality of roof forming elements is supported by a first longitudinal side of the first roof forming element, the third roof forming element neighbouring the first roof forming element, the first longitudinal side of the first roof forming element being opposite the second longitudinal side of the first roof forming element, so that the beam of the first roof forming element also supports the roof plate of the third roof forming element, and so that the respective roof plates of the first roof forming element and the third roof forming element are flush with respect to each other;
• wherein the integral combination of the roof plate and the beam is at least substantially made of a polymer;
• wherein the ratio between the height of the beam and the width of roof plate element is in the range of 1:15 to 1:1;
• and
• wherein the plurality of roof forming elements comprises a photovoltaic element in its interior space.