You gently lift and a window slides silently and effortlessly open. It’s a wonderful feeling, but there’s a lot of science behind developing the perfect sash window. At Ventrolla, sash windows are hand-made by our team to exact specifications. You can immediately see the craftsmanship that goes into a Ventrolla sash window: the beautiful period detail and the millimetre precision joinery. But what about the science and craftsmanship that you can’t see? How does the interior mechanism of a sash window work? Let’s take a look behind the magician’s curtain…
Sash cords are the slender ropes that you see inside the casement of a sash window. These cords are the secret to balancing the weight of the window, so that the bottom panel will slide up effortlessly.
Much of the functionality is hidden inside the casement of the window. The cord is looped over a service pulley, and is attached to a metal counterweight. Through this counterweight and the multiplied force of the pulley, the weight of the window panel is minimised.
What’s so special about a Ventrolla sash cord?
Ventrolla sash windows are hand-made by experts to millimetre precision. The sash cords correct sash balance to ensure a perfect slide to your window. All of the elements of the sash cord: the cord, the pulley and the counterweight are high quality components built to last.
If you’d like more information about the construction of Ventrolla sash windows, please contact our team.