About Ventrolla

As heritage specialists, Ventrolla is obsessed with restoring heritage timber windows and doors, and has been for over 40 years.

Our Team

We share a deep passion for preserving heritage, combining exceptional craftsmanship, attention to detail, and decades of experience.

Projects

Working with some of the most discerning heritage property homeowners and retrofit architects, contractors, and surveyors on their restoration projects.

Timber Windows

With nationwide coverage, you always benefit from local British craftsmanship.

Timber Doors

Manufactured in our bespoke joinery houses.

Enquire

Give your heritage building the craftsmanship it deserves.

Consultancy & project management

Ensuring seamless and efficient execution for commercial projects.

Projects

Working with some of the most discerning heritage property homeowners and retrofit architects, contractors, and surveyors on their restoration projects.

Windows & Doors

November 12, 2020

By ventrolla24

Sash windows that glide open – How sash cords work

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…

What are sash cords?

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.

How does a sash cord work?

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.