Abstract: A louvre type roof structure including a plurality of parallel slats mounted on carrier beams extending transversely to the slats, in which the slats are mounted on carrier elements which are in turn mounted on the carrier beams to permit pivotal displacement of the carrier elements and of the slats between a closed position in which they are disposed in a roughly coplanar position, and an open position in which they are disposed in spaced apart parallel planes. The carrier elements are secured to the slats by means of lugs engaging the slats without penetrating the slats. The carrier elements are mounted on the carrier beams by mounting levers, a pair of mounting levers being provided in respect of each carrier element, one of a pair of levers being a fixed lever and being secured to the carrier beam in a fixed position, and the other one being a free lever and being displaceable relative to the carrier beam.