Traditional sash windows featured a piece of timber which acted as a restrictor to prevent the window from being opened too far. This was important to to avoid damage to the weights. With modern balance mechanisms, this is not necessary, but the horns remain important if the windows are to look authentic.
Continuous "Run Through" Horns
On modern PVCu windows, these horns are generally an add on and the join is noticeable. At Henry James, we have recently taken this one step further, and as with timber windows, our PVCu decorative horns are a continuation of the window profile, making it almost impossible to tell whether a window is made from timber or PVCu.
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