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Sash windows are an elegant and functional feature in period properties, but over time, the cords that hold the counterweights can wear down or snap, requiring replacement. Re-cording sash windows is a crucial part of window maintenance, ensuring smooth operation and longevity. One of the most efficient ways to tackle this task is by using the Cat’s Cradle Method, a technique designed to make the process faster, more organised, and less frustrating. This method prevents the common issue of losing weights inside the window frame, which can be difficult to retrieve, especially in older properties where access to the weight box is limited. Instead of struggling with fallen weights or attempting to thread new cord manually, the Cat’s Cradle Method offers a simple yet effective way to replace old sash cords while keeping everything under control.
The Cat’s Cradle Method is a technique used when re-cording sash windows to ensure the new cord is guided correctly through the pulley system without the risk of losing the counterweights inside the box frame. It involves attaching a guide string to the existing sash cord before removal, allowing for seamless installation of the new cord by following the same path. This method is very beneficial for older sash windows where access to the weight box is difficult or where excessive handling of the window frame could cause damage.
This approach is highly effective for preventing weights from falling inside the frame, which can save time and effort when working on a sash window. By using a guide string and weight (nicknamed a "Mouse") the new cord is automatically threaded through the correct route, eliminating the need to fish for the weight or struggle with misalignment. This method also minimises disruption to the window structure, making it ideal for heritage properties where careful handling is essential. In addition to making the process more efficient, the Cat’s Cradle Method ensures the new sash cord is positioned correctly on the first attempt, reducing the likelihood of needing adjustments after installation.
Before beginning, it is important to have the necessary materials, including a durable sash cord, a guide string or thin rope, a sharp knife or scissors, and a screwdriver to access the weight pocket. The first step is to locate the existing sash cord and tie a strong guide string to the end before cutting or removing the old cord. This ensures that as the old cord is pulled through the pulley system, the guide string remains in place, keeping the path open for the new cord. Once the old cord has been fully removed, the next step is to securely tie the new sash cord to the guide string. It is important to use a firm knot that will not slip or come undone during the threading process. After attaching the new cord, the guide string is gently pulled back through the pulley, bringing the new sash cord into the correct position without allowing the weight to drop into the frame. With the new cord successfully threaded, it is then tied securely to the sash weight before reattaching the weight pocket cover. The final step involves fixing the cord to the sash itself, ensuring the correct tension for smooth operation. Once everything is secured, the window should be tested to confirm that it opens and closes properly, with the counterweights moving freely within the frame.
To achieve the best results, using high-quality sash cord is essential, as lower-grade materials can wear out quickly and require replacement sooner. It is also a good idea to check the condition of the pulleys as worn-out or rusted pulleys can cause excessive friction leading to premature cord failure. If the pulleys appear rough or stiff, applying a small amount of lubricant, such as beeswax or graphite powder can help ensure smooth operation. When replacing a broken cord, it is advisable to re-cord both sides of the window, even if only one has snapped. This prevents uneven wear and ensures the window continues to function correctly for years to come. Additionally, taking care when handling older sash windows is important, as excessive force can cause damage to the frame especially in heritage properties.
The Cat’s Cradle Method is a simple yet highly effective way to re-cord sash windows without the frustration of lost weights or incorrectly threaded cords. By following this technique the process becomes more efficient by reducing the time and effort required for re-cording while preserving the integrity of the window. For those who prefer expert assistance, Traditional Sash Windows and Carpentry offers professional sash window repairs, draught proofing and restoration services. If your sash windows need attention, contact us today for a free consultation and let our specialists restore them to their original functionality and beauty.