(57) The invention discloses a window top covering, which is used to cover the transitional
area of the frame and the top of the sash of the window, seal and water proves the
top of an openable window. It comprises a first top covering which is placed on the
top part of the frame, and a second top covering which is placed on the top part of
the sash, where the first top covering having a downwardly bending front edge and
the bending back edge, where the said back edge is below the said front edge engaging
with each other allowing rotation between them. This window top covering has a better
sealing performance, wider open angle and a decent appearance. It is in particular
suitable for a sloped roofwindow.
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