How to Repair a Sash Cord in Original Sash Windows
Sash cords are an important component in traditional sash windows. Over time, these cords can fray, snap, or become detached, preventing the sash from moving smoothly.
Replacing old sash cords is a fairly straightforward DIY project for any homeowner. Here is a step-by-step guide to repairing sash cords in original sash windows.
What is a Sash Cord?
Sash cords are strong rope cords that run through pulley wheels at the top of a sash window frame.
The cords are attached to the bottom rail of each sash window to counterbalance the weight of the sash when raising or lowering.
Sash cords allow the sash to remain in any position without needing to be propped open.
Common Problems with Sash Cords
Some common signs that sash cords need to be replaced include:
- Window sticking when opening or closing
- Sash dropping down when released
- Frayed or broken cords
Replacing damaged sash cords restores smooth operation.
Preparation
Tools Needed
Here are the basic tools needed for this project:
| Tool | Price | Powered? | Ease of Use |
| Utility knife | £5-10 | No | Easy |
| Hammer | £5-20 | No | Easy |
| Cordless drill | £50-100 | Yes | Easy |
| Screwdrivers | £5-15 | No | Easy |
| Metal file | £5-10 | No | Moderate |
| Safety glasses | £2-10 | No | Easy |
Safety Measures
Wear safety glasses when removing sash and driving screws. Use care when operating power tools and sharp tools.
Preparing the Room
Remove any furnishings or items from around the window area. Spread a drop cloth to catch debris.
Removing the Old Cord
First, remove the sash by detaching any trim pieces and sliding the sash upward. Locate the broken cord ends and cut them loose. Remove any staples, tacks or nails securing the cord. Pull the cord free from pulley wheels and pathways.
Cleaning the Window Frame
With the sash removed, clean the window channels and pulleys with a vacuum, brush or clean rag. Check pulleys are in good, moving condition. Lightly lubricate with silicone spray if sticky.
Installing the Replacement Cord
Selecting the Right Cord
Look for braided nylon sash cord in the appropriate size for your windows.
Measuring and Cutting New Cord
Measure each cord channel pathway. Cut cord lengths about 18 inches longer to allow tying off at bottom.
Securing Pulleys and Access
Remove any pulley covers. Screw pulleys in place if loose. Open access panels if existing.
Threading the New Cord
Feed the new cord through each pulley wheel and down the pathways. Use a wire if needed to thread cord through inaccessible areas.
Tying Off the Cord
Attach cords to sash balance holes with tight double knots. Trim excess cord.
Finishing Touches
With new cords installed, rehang sashes on each line. Test movement and make cord adjustments if needed. Replace any pulley covers, sash stops or trim pieces. Clean the window glass and surrounding area when complete.
Replacing worn sash cords restores smooth operation in traditional sash windows. Follow these steps and refer to manufacturers’ guidelines for best results.
Contact a window restoration professional if challenges arise during your repair project.