Why do some window grilles have a curve at the bottom?

You see them on old buildings as well as modern homes: window grilles with a gentle outward curve. This distinctive design element has been present in many regions for decades and continues to raise questions. Why is this shape so widespread? What considerations lie behind this design? A closer look reveals that it’s not simply a matter of aesthetics. There’s often more to this seemingly simple form than meets the eye.

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Why do some window grilles have a curve at the bottom?

Window grilles, also known as security grilles, have been used for centuries as an effective barrier against burglary and unauthorized access. Beyond their protective function, some grilles feature an outward-curving design on the underside, commonly referred to as the “granny belly” or “donkey belly” style. But why this particular detail?

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Functionality and design in one element

This type of curve is not just a matter of aesthetics. It offers several practical advantages that lead many homeowners to choose this design:

More usable space: The curve creates additional space between the window and the grille, ideal for placing flowerpots, herbs, or even portable air conditioners without compromising security.

Improved ventilation and light: By moving the grille bars away from the window frame, you allow for better air circulation and more natural light, which is especially beneficial in hot climates.

Aesthetics and added value: This type of design lends the facade a classic or handcrafted touch, thus increasing the visual appeal of the house and, in some cases, even its commercial value.

Safety first:
While the design may be appealing, safety remains paramount. To ensure effective protection, it is important to consider the following:

Durable materials: Galvanized steel or wrought iron are the best choices, as they offer high resistance to cuts, corrosion, and weathering.

Professional installation: Proper installation is essential. To see the rest, tap the photo.