Sash Horns

Sash Window Horns

Sash horns are the small shaped extensions at the ends of a sash window’s meeting rail. They were introduced to strengthen traditional timber joints and to stop the sashes from being pushed up too far. Today they’re also used to match period details on many London and Home Counties homes, especially in conservation areas.

What Are Sash Horns?

A sash horn is a visible projection that often extends below the meeting rail of a timber sash window. Originally introduced during the Victorian era, horns were added to strengthen the mortise and tenon joints of the sashes and prevent the window from being opened too far. Over time, they became a signature detail in period architecture.

Why Sash Horns Matter Today

While originally structural, sash horns continue to play a role in maintaining the correct proportions of traditional timber windows. They help meet conservation area standards and can give a more authentic profile, especially when matching historic properties.

Sash Horns and Restrictors

On some windows, customers request internal sash horns on the inside bottom sash. Where these are included, sash restrictors need to be placed 100mm above them. If a restrictor is accidentally left on, the sash can catch against the horn, which may mark the paint or timber. To avoid this, we don’t include internal bottom sash horns as standard, but we’re happy to add them if you’d like.

Learn more about sash restrictors here.

Explore Our Sash Horn Styles

We offer 12 sash horn styles that suit a variety of period homes and traditional sash window designs. These horns are optional, but many customers choose to include them when matching existing windows or following conservation guidelines. If you’re not sure which one is right for your project, your installer or architect may be able to advise.

When selected, sash horns are fitted as standard on the exterior of the top sash only. If you’d also like horns on the interior bottom sash, just let us know — we include this at no extra charge.

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