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Victorians produced larger, thicker and heavier sheets of glass so they incorporated sash horns to the underside of the top sash. These acted as a “stop”, to prevent sashes being over-extended, smashing the pulley wheels or damaging the lead weights inside the box framework.

Today, sash horns are purely decorative as there are other methods to prevent sash windows being over-extended; however, they are often retained to keep the traditional appearance of box sash windows.

All trade ranges come with continuous horns as standard with the option to not have horns at all.