Secondary glazing sash stop

摘要

A detachable sash stop 13 is integrated into a secondary glazing unit which is attached on the interior side of a traditional sash and case window to improve the thermal insulation of the building. The outer frame 12 of the secondary glazing is located behind the window linings of the original window frame which have been moved outwards (cf. Fig 1) and a new insulation zone 10 has been inserted behind the original window shutters or panels 1. A packing zone 8 is also inserted under the architrave 6. The secondary glazing can be opened and the glazing sash stop 13 removed thus allowing the window batten rod 14 to also be removed. This permits the sash and case window to be opened and rotated as normal for cleaning, airing of the building etc. The removable sash stop can be removed using a proprietary socket key. Two embodiments of the removable sash stop are disclosed.