Multi-layered skylight

A multi-layered skylight having an outer element with a central domed portion, a substantially planar circumferential edge portion and a circumferential skirt portion extending downwardly from said edge portion, said outer element comprising a monolayer of a synthetic resin which transmits light, and an inner element of one-piececonstruction with a central domed portion and a substantially planar circumferential edge portion, said inner element comprising at least two sheets of a synthetic resin which transmits light, said sheets being closely spaced and parallel to one another, and having a plurality of elongated supporting elements integrally formed therewith and extending therebetween across the dimensions of said sheets between the substantially planar circumferential edge portions thereof and dividing the space between said sheets into a plurality of separate elongated chambers, said inner and outer elements being arranged with the planar edge portion of said inner element being located below the planar circumferential edge portion of the outer element within and surrounded by the circumferential skirt portion of said outer element, with the domed central portions of said inner and outer elements having substantially the same curvature and extending in substantially parallel spaced relationship to one another.