If you are looking for a window that has a more period and heritage look or for windows that have the appearance of smaller individual panes of glass, there are two options Astragal Bars and Georgian Bars.

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Georgian Bars are made to give the appearance of a more traditional window by placing shaped bars inside the glazed unit. Whilst they don't have the same external bars, giving a true multiple pane look, the Georgian Bar option is cheaper than Astragal Bar and the flat glass panes make it easier to clean.