What is wrong with wooden double glazed sash windows of the same pattern as the originals?
A. It is virtually impossible to replicate wooden windows in double glazing. This is because two panes of glass set 12mm apart need much thicker timber supports to deal with the heavier weight. Details such as glazing bars are correspondingly bigger. Some of the new slim line double glazing gets much closer in design to the originals but it is quite obvious because of the double reflection caused by two panes of glass close together.
