Known in some designs as a “potbelly,” the bulging section of a window grille can create extra space outside the window while still maintaining a protective barrier. Depending on the building and the design, that space can be used for everything from flower boxes to accommodating window air-conditioning units.
So why were these unusual window bars designed this way in the first place?
What Are Window Bars Actually For?
Window bars, also called security bars or window grilles, are primarily designed to provide an additional physical barrier over a window.
Windows can be vulnerable points in a building, particularly on ground floors or in areas where they are easily accessible from outside. A properly installed grille can make unauthorized entry more difficult while still allowing light and air to pass through.
Over time, however, window grilles became more than simple arrangements of straight metal bars.
Blacksmiths, metalworkers, architects, and homeowners began incorporating curves, scrolls, decorative patterns, and outward projections into their designs.
And that’s where the unusual “potbelly” shape comes in.
