Sash pulleys

As one of the most important parts of a sash window, sash pulleys are essential for reliability and ease of opening. A sash pulley is mortised into the side of the frame near the top. The sash cord or sash chain then passes over the pulley and is attached to the counterweight inside the sash box. The counterweight balances the sash as a result. Sash window pulleys are often need replacing when Victorian or Georgian timber sash windows are refurbished because they have either been painted over or have tarnished in the sun.