Abstract: A sliding door having sliding and fixed door panels with extruded top, bottom and side sections all of an identical first extrusion, and joined at corners to form a rectangular frame, the first extrusion having an interior rectangular closed box portion with side walls and end walls, inner and outer facing walls located in spaced parallel relation from the side walls of the box portion, junction walls extending between the side walls of the box portion, and the inner and outer facing walls, and glass retaining formations connected with the inner and outer facing walls, and having door jambs and an upper cross member formed of an identical second extrusion which defines a receiving channel for the sliding door panel, and having a lower threshold defining a top wall and rail registering with the receiving channel.

Abstract: A skylight window having a window base frame to be received in a window opening, a window housing to receive glazing, and, a glazing frame to be attached to the housing for retaining the glazing, the base, housing and frame all being formed of extruded thermoplastic.

Abstract: A thermoplastic window having a window border to be received in a window opening, a first engagement device formed on the window border extending continuously along all sides, a window housing, a second engagement device extending continuously around all four sides of the housing, the second engaging device being interengageable with the first engagement device in mutually interlocking relation, and a locking strip for retaining the glazing.