Skylight and frame therefore

Claim 1

A skylight frame structure for mounting a skylight sheet over an aperture in a roof structure and the like, the frame structure comprising a unitary one piece having a plurality of upstanding walls interconnected and defining an opening therebetween and with upper and lower portions, said frame structure having a profile produced by molding, the lower portions of said walls resting on the roof structure and enclosing the aperture in the roof, and with said opening in general alignment, said piece having, when installed, an external side and an internal side, the upper portion of each of said wall of said piece having at least one substantially horizontal groove open at said internal side and directed toward the opening in said piece, said grooves being interconnected and receiving the rim of the skylight sheet, a collecting recess adjacent said grooves at said internal side for collecting water caused by condensation and the like, at least one downwardly inclined orifice extending from said collecting recess to said external side of said piece, and at least one indicating means in at least one of said walls, at an external side of the upper portion thereof, said indicating means indicating a plane along which a cut can be made from said external side to said internal side, whereby said upper portion of said piece can be separated at said groove by the cut so that the rim of different sized skylights can be inserted into said grooves while a portion of said upper portion is separated from the remainder of said upper portions.