Abstract: A tilt in window with sashes movably mounted to the interior of the frame and inwardly pivotable. Each of the sashes is held within jamb channels by capture legs which overlap a portion of the interior side of the sashes to restrain the sashes from inward movement, when the window is normally closed. The sashes are movable within the jamb channels for a distance to permit sashes to be removed from being held by the retaining members. With such removal the sashes are able to be inwardly pivoted. In one embodiment, a bottom outwardly facing sill is sloped downward to prevent water accumulation with the sill being integrated with sloping jamb sections, in continuity with the sill. The frame has retention elements for snap in parallel placement of separate jamb members having channels with the capture legs for holding the sashes and channels for the counterbalance weights or springs.