How to replace sash window cords

Sash windows are an important part of many homes, and if the cord is damaged, they no longer function effectively. This means you may need to learn how to replace them.

What is a sash window cord?

A sash window cord is connected to a series of pulleys and weights concealed within the casing of a sash window. Traditionally, waxed cotton cord is used, but some heavier windows require chains. Specialist sash window repair from specialists such as sashwindowpreservation.co.uk/services/sash-window-repair can fix structural damage to the window, but cord replacement can be done yourself.

How to replace it

First, remove the entire sash, which requires two people, preferably experienced joiners. You can then take out the inner rod by unscrewing or detaching its screws/nails/turnbuckles/hinges. For a top sash, you should also remove the parting bead. A tack lifter can separate the cord from the sash, then you can lift the lid of the weight box cover so it can be cleared of accumulated dirt and rubbish.

Take an overlong segment of your new cord, run it over the pulley and attach it to the weight in the box. Adjust the length so it hangs between 75mm and 100mm above the box’s base. Keep the sash supported as you pull down the cord to fit slackly in its groove, then nail the cord in place. Finish by repositioning the sash and returning the bead and inner rod.

Proper maintenance of your sash window, including its cord, is essential if you want to maximise its lifespan and save yourself money in the long run.