uPVC Sash Window Won’t Stay Open or Closed?
If your uPVC vertical sliding sash window keeps dropping, won’t stay open, or won’t stay closed, the most common cause is a failed spiral balance or spring mechanism.
These balance systems are designed to support the weight of the sash window. Over time, the internal spring can weaken or break, causing the window to become unsafe or difficult to operate.
At SASH Services, we specialise in diagnosing and repairing spiral balance failures in uPVC sash windows across London and the surrounding areas.
Signs Your Spiral Balance Has Failed
You may need spiral balance replacement if your sash window:
• Drops suddenly when opened
• Will not stay open
• Will not stay closed
• Feels extremely heavy to lift
• Appears uneven when moving
These problems are especially common in uPVC sash windows that are 8–15 years old.
Spiral Balance Repair vs Window Replacement
Many window companies recommend replacing the entire window, but in most cases this is unnecessary.
Replacing the spiral balances can restore the window to full working order at a fraction of the cost of new windows.
Our repair service typically includes:
• Removing the sash
• Replacing worn spiral balances
• Rebalancing the sash weight
• Adjusting the window for smooth operation
• Testing for safe and reliable movement
Specialist Sash Window Repairs
While we are well known for traditional timber sash window repairs, we also repair many modern uPVC vertical sliding sash windows installed by manufacturers such as:
• Anglian
• Everest
• Safestyle
• Other UK window installers
Even if the original installer no longer offers repairs, we can usually help.
Areas We Cover
We provide sash window repair services across:
• Beckenham
• Bromley
• Croydon
• South London
• Kent
• Greater London
Need Help With a Broken Sash Window?
If your sash window won’t stay open or closed, the balance system may have failed.
📞 Call or WhatsApp: 07454 544646
We provide professional sash window repairs with fast response times across London.