Abstract: A skylight is disclosed for installation in an opening disposed in the top of an enclosure. The skylight includes framing sections providing for variation in installations and accommodating on site adjustments when fastening and fitting the skylight within the opening of the enclosure. The framing sections are adapted to receive supplementary moldings adapted to friction fit with the framing section which provide for variation in installation tolerances and cover any undesirably exposed portions of the enclosure resulting from installation of the skylight, while accommodating on site adjustments.