Spiral Balance Repair
At Sash Cord Repair Man, we specialise in professional servicing and repairs of spiral balances for modern sash windows. If your window feels heavy, won’t stay open, or suddenly drops shut, the problem is likely due to worn or broken spiral balances. Unlike suppliers who only sell the hardware, we focus on installation, repair, and ongoing servicing, so you don’t have to worry about sourcing parts or attempting a DIY fix.
The History of the Sash Window Spiral Balance
The spiral balance is one of the most important innovations in the history of the sash window. Before its invention, sash windows relied almost entirely on counterweight and cord systems. While these were effective, they were also prone to wear and tear—cords frayed, pulleys jammed, and heavy weights caused problems for both homeowners and joiners.
The spiral balance system was developed in the early 20th century as a modern alternative. Instead of relying on heavy weights hidden in the frame, spiral balances use a steel rod fitted with a spiral-shaped spring inside a protective tube. This spring mechanism provides the right level of tension to counterbalance the sash, making windows easier to open and close.
What Is a Spiral Balance?
A spiral balance (also known as a spiral sash balance) is a spring-loaded mechanism inside the window frame. Its job is to counterbalance the weight of your sash, allowing the window to move smoothly and stay in place at any height.
Over time, spiral balances can:
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Lose tension and stop supporting the sash properly
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Snap or break, causing the window to slam shut
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Create uneven movement between the left and right sides
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Make your window feel stiff, stuck, or unsafe to use
When this happens, the only reliable solution is a professional spiral balance repair or replacement.
Why Spiral Balances Need Servicing
Like any mechanical part, spiral balances wear out over time. Common reasons for servicing include:
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Safety issues – A failing spiral balance can allow the sash to drop suddenly, creating a hazard.
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Smooth operation – Regular servicing ensures your windows open and close effortlessly.
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Energy efficiency – Properly balanced sashes close tightly, reducing drafts and heat loss.
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Longevity – Servicing prevents further damage to frames, cords, and locks.
At spiralbalancerepairs.co.uk, we don’t just replace faulty balances—we check, adjust, and service the entire sash window system to restore performance.
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Our Spiral Balance Repair Process
We provide a complete repair and servicing solution:
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Inspection – We identify whether the spiral balances need tensioning, repair, or full replacement.
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Parts in Stock – We carry most balance types and sizes, meaning same-day service is often available.
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Replacement in Pairs – We always replace both sides together to ensure even tension and long-lasting performance.
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Tensioning & Testing – New balances are tensioned to match your sash weight perfectly and tested multiple times.
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Final Adjustment – We check alignment, seals, and smoothness of operation before finishing.
Why Choose Spiral Balance Repairs?
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Specialists since 1990 – Over 30 years repairing sash windows across the UK.
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No part sales – installation only – We supply and install the correct balances for you.
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Same-day repairs – With parts in stock, we aim to fix your windows on the first visit.
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Professional, reliable service – Clear pricing, tidy work, and expert craftsmanship.
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Complete sash window care – From spiral balance servicing to sash cord repair and draught-proofing.
Serving Homeowners, Landlords & Businesses
We work with:
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Homeowners restoring or maintaining sash windows
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Landlords needing reliable repairs for tenants
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Property managers maintaining multiple sash windows
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Commercial properties requiring fast, professional servicing


