Skylight

A skylight window comprising:

• a four-sided window base frame formed of extruded thermoplastic adapted to be received in a window opening in a building structure;
• roof flashing means formed on said base frame, extending outwardly therefrom around all sides thereof;
• a window housing connected to said base frame and adapted to receive glazing therein;
• said window housing comprising in section a first rectangular four-sided structure formed of extruded thermoplastic and having inner and outer walls and upper and lower walls, and interior supporting walls formed therein along its length, a second rectangular tubular structure formed on said upper wall of said first rectangular tubular structure, said second rectangular structure defining inner and outer walls and a top wall, said inner wall being located in a plane offset outwardly with respect to said inner wall of said first structure, whereby to define a flange means to receive glazing thereon, parallel spaced apart bracing walls located on the interior of said second tubular structure, said bracing walls being spaced apart a distance appropriate to receive fastening means therebetween;
• a glazing frame adapted to be attached to said housing for retaining glazing therein;
• and,
• said glazing frame comprising a generally L-shaped tubular structure in section, defining inner and outer walls adapted to overlie said top wall of said second tubular structure of said window housing, and adapted to overlie said glazing on said flange means, whereby to engage said glazing on said flange means and clamp the same in position, and junction walls extending between said inner and outer walls and registering with said bracing walls in said housing, to receive fastenings therein.