Abstract: A combination of profiles for forming slider and double hung sash windows or patio doors includes a common outer profile and two different inner profiles so that one inner profile can be used to form the double hung and the other to form the slider. This allows the slider top inner to be cut away to form a floating section resting on the top of the sash. This allows the drain holes to be formed separately in the inner and the outer to be longitudinally offset to prevent direct air penetration. The sash frame is formed with a removable glass stop on one side which snaps into engagement at right angles to the glass surface of the sealed unit to allow formation of a tri-pane with 0.5 inch spacing and to allow the use of two strips of adhesive one on each side of the sealed unit with no need for drainage.

Abstract: A prefabricated window system includes a main frame which is fabricated from thermoplastic elements having substantially the same cross-sectional configuration. Windows and a screen are slideably mounted in the main frame. A thermoplastic sill is snap-connected to the bottom portion of the frame and a decorative cover is snap-connected to the top portion. Stop elements, having the same cross-sectional configuration as the cover element, are snap-connected to the side portions of the frame in order to prevent the windows from being raised or lowered too far. The windows can be pivoted for cleaning, and the frame includes portions which overlap the outer peripheries of the windows to prevent them from inadvertently being rotated outward. These portions also reduce air incursion. A latch is mounted on one window and a keeper which cooperates with the latch is mounted on the other, the keeper being firmly mounted in the window sill by upwardly extending screws.