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A plastic skylight having a central dome and a pair of standing seam edges is suitable for installation in metal standing seam roofs and shingled roofs without a curb. The standing seam edges are joined to adjacent metal standing seams with the same covered by battens. The other edges of the skyligh

A plastic skylight having a central dome and a pair of standing seam edges is suitable for installation in metal standing seam roofs and shingled roofs without a curb. The standing seam edges are joined to adjacent metal standing seams with the same covered by battens. The other edges of the skylight form flat flanges overlapping adjacent metal panels. When used on a shingled roof, step flashings and anchor clips are fastened to the plastic standing seams. The skylights may be clustered to form sunroofs.

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A skylight molded from sheet plastic for installation in a roof formed from a plurality of metal roof panels, each of said metal panels having a pair of upstanding edges with the top edges thereof folded inwardly with means for joining such edges with adjacent abutting upstanding edges comprising: a

A skylight molded from sheet plastic for installation in a roof formed from a plurality of metal roof panels, each of said metal panels having a pair of upstanding edges with the top edges thereof folded inwardly with means for joining such edges with adjacent abutting upstanding edges comprising: an essentially rectangular first sheet of plastic having a pair of longitudinal edges thereof folded upwardly to form an angle with said sheet of plastic, each of said upwardly folded edges having a top edge thereof folded inwardly to match said upstanding seam edges of said metal roof panels in which said folded up edges are spaced apart a distance slightly less than the spacing of said upstanding seam edges of said metal standing seam roof panels at one end of said sheet of plastic and spaced apart a distance slightly greater than the spacing of said standing seam edges of said metal standing seam roof panels at the other end thereof, said first sheet of plastic having a pair of lateral edges thereof forming a first lateral self flashing flange at said one end of said sheet of plastic for overlapping a first of said metal roof panels, and a second lateral self flange at said other end of said sheet of plastic for underlapping a second of said metal roof panels; and a dome formed in and projecting upward from said sheet of plastic.