Why are some window bars curved at the bottom?

Why do some window grilles have a “belly” and what are those curves for?

Have you ever walked past a building and noticed that the window grilles protrude, creating a small curved cavity or “tummy”? At first glance, you might think the curves are just decorative details, a stylistic touch added by the builder. But those protruding grilles actually serve several ingenious and practical functions.

In this article, we’ll explore why some window grilles bend outwards, what those bulges are used for, and how these charming curves combine beauty and security.

What are window bars used for?

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