If your sash window is difficult to open, drops unexpectedly or won’t stay up, the most likely cause is a broken or worn sash cord. Sash Window Experts provide professional sash cord replacement, pulley maintenance and counterbalance weight adjustment for period timber sash windows across Sussex, Surrey and Kent.
With over 30 years’ experience, our sash window specialists restore the full, smooth operation of your windows without compromising their original character.
Sash Cord Repair & Replacement
A broken or worn sash cord is the most common reason a sash window stops working correctly. Common signs that your sash cord needs attention include:
- Window won’t stay open: The sash slides down immediately after being lifted or slams shut unexpectedly.
- Difficulty operating: The window is heavy to lift, jams or sticks in place.
- Visible damage: Cords appear frayed, snapped or very thin where they pass over the pulley.
- Uneven movement: One side of the window hangs lower than the other or feels lopsided when moved.
- Thudding from inside the frame: A clunking sound from inside the frame indicates a counterweight has fallen
What the Service Involves
- Full re-cording: We check all four cords in a box sash window and in most cases replace all of them, not just the one that has failed, as cords deteriorate at the same rate.
- Modern replacement cords: Improved cords are used throughout, with extra strong cords specified for double-glazed sashes to handle the additional weight.
- Complete restoration: The sash is removed from the frame, re-corded and rehung, restoring the window to full working order.
What Our Customers Say
Sash Window Pulley & Weight Services
As part of every re-cording visit, we lubricate the pulley axles so the cords run freely. We also check the counterbalance weights and correct them where necessary. Incorrectly weighted sashes are a common cause of operating problems, even when the cords themselves are intact.
Not all sash windows use the same pulley and weight system. Traditional box sash windows use pulleys and counterbalance weights, while some windows, particularly those from the mid-20th century or later replacements, use spring balances or spiral balances instead. Modern sash windows often use pre-tensioned balances that eliminate pulleys altogether.
Whichever system your window uses, we have the expertise to repair and restore it.
Our Sash Cord Repair Process
Every job follows the same careful process to restore your window to full working order:
1. Remove the sash from the frame:
We take out the sash along with any stops, parting beads and trim to gain full access to the cord and pulley system.
2. Remove the old cords and access the weights:
Existing cords are cut and removed from the pulley. The pocket covers on either side of the frame are opened and the counterbalance weights are detached and removed for inspection.
3. Check and correct the counterbalance weights:
We verify the weights are correctly matched to the sash and adjust the balance where necessary before fitting the new cords.
4. Fit new cords and lubricate the pulleys:
New cords are measured, cut and threaded through the pulleys and tied securely. Pulley axles are lubricated so the window runs smoothly.
5. Clean and prepare the sash:
Before re-hanging, we clear any paint build-up from the running surfaces and clean and reattach the sash furniture so the sash sits and moves correctly in the frame.
6. Rehang and test:
The sash is reinstalled with the new cords properly aligned and tested for smooth, balanced operation. Once we are satisfied the window is running correctly, the stops, parting beads and trim are refitted.
Sash Cord Repair vs. Full Renovation
If your window mechanism has failed but the timber frame is in good condition, a sash cord repair is usually all that’s needed to restore full function. This is a direct service that addresses the cord, pulley and counterbalance system without the wider scope of a full renovation.
If your windows also show signs of timber decay, paint build-up, draught issues or more significant structural wear, a full sash window renovation may be the better option. We assess every window individually and will always advise on the most suitable course of action before any work begins.
Can I Replace a Sash Cord Myself?
Replacing a sash cord involves removing the sash from the frame, accessing the pulley system and correctly calibrating the counterbalance weights. The process requires the right tools, technical knowledge and an understanding of how the cord, pulley and weight system works together. Incorrect installation can place uneven stress on the remaining cords and lead to further failures.
For these reasons, sash cord replacement is best left to a specialist. Our team has over 30 years’ experience working on period sash windows across Sussex, Surrey and Kent.
Why Choose Sash Window Experts?
- 30+ years of specialist experience: We have spent over three decades specialising in the repair and restoration of period sash windows across the South East.
- Family-run, specialist team: We are a small, family-run business with a dedicated team of sash window specialists who take pride in the quality of every job.
- Covering Sussex, Surrey and Kent: We carry out sash cord repairs across the South East, serving homeowners in Sussex, Surrey and Kent from our workshop in Surrey.
- Free no-obligation survey: Before any work begins, Mark will assess your windows in person, with no obligation to proceed.
- 5-star rated: We are proud to hold a 5-star Google rating from homeowners across Sussex, Surrey and Kent.
Frequently Asked Questions
-
How do sash windows work?
-
Sash windows operate using a vertical sliding mechanism. Each sash is counterbalanced by a pair of weights on either side, hidden inside the box frame, giving a total of four weights per window.
The weights are connected to the sashes by cords that run over pulley wheels at the top of the frame, allowing the window to slide open and stay in any position without effort.
-
Why do sash cords break?
-
How long do sash cords last?
-
Can you repair just one broken sash cord or do all four need replacing?
-
Do you repair sash cords on double-glazed sash windows?
-
What areas do you cover for sash cord repair?
47 Reviews
Arrange a No Obligation Survey With Mark
Hi, I’m Mark, owner of Sash Window Experts. I’d love to talk to you about restoring period windows. Please fill out the form or call me on 01403 602701 to arrange your FREE no obligation window survey and to discuss your requirements.
