# Open–topped pediment

An open-topped pediment is a decorative architectural feature where the traditional triangular or segmental crown above a window or door is left open at the apex, creating a stylised ‘U’ or broken arch effect.

Popular in Georgian and Regency design, it adds visual lightness and classical flair without the formality of a full pediment.

In sash window surrounds, open-topped pediments are typically crafted from timber and integrated into the architrave-often seen in townhouses and villas seeking elegant yet understated ornamentation. During restoration, preserving this detail is key to maintaining period authenticity.