The outward curve creates a small shelf-like space that allows homeowners to place flower boxes or potted plants safely outside the window. The grill helps hold the planter in place while still protecting the window.
This design is especially popular in European and Mediterranean architecture, where window gardens are common.
🏠 2. Improved Window Function
Another reason for the curved design is to allow the window to open more easily. If the bars were completely flat against the window, they could interfere with opening or cleaning it.
The curve creates extra clearance, making it easier to open outward windows or access the glass for maintenance.
🧺 3. Extra Storage Space
In some homes, especially in dense urban areas, people use the curved area to temporarily place small items, such as:
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Cleaning supplies