If your manual roller shutter feels too heavy to lift or slams shut too quickly, the internal spring tension is likely out of balance. Springs help counterbalance the shutter’s weight, allowing you to open and close it smoothly. Over time, these springs can lose tension, especially with frequent use or age.
In this guide, we’ll walk you through how roller shutter spring adjustment works, when it’s needed, and why this job is best left to a trained professional in most cases.
Roller shutter spring mechanisms are under significant tension. Attempting to adjust them without the proper tools or experience can be dangerous. If you're unsure or if your shutter feels jammed or unpredictable, it’s safest to contact a professional like Fix My Shutters.
These signs usually mean the torsion spring has loosened and needs to be re-tensioned.
Note: Some shutters require a complete drum removal or uncoiling. Proceed only if you're confident in your ability to work with loaded spring tension safely.
Make sure the curtain is fully down and the shutter is not under additional load. This reduces tension on the spring.
Use a screwdriver to unscrew and remove the cover that protects the spring mechanism. Be cautious — the spring may be under tension.
Identify the torsion spring inside the housing. The spring will usually be coiled around a central shaft or axle connected to the drum.
Insert your winding rod into the socket of the tension plug or collar. Carefully turn in small increments:
Adjust 1–2 quarter turns at a time, then test the balance by opening and closing the shutter.
Once the shutter opens and closes smoothly — staying in place without falling or feeling heavy — replace the cover and re-tighten all fasteners.
If any of the following apply, call a professional:
Spring tensioning can be risky if done incorrectly and may damage the shutter further or cause injury.
We’ve helped hundreds of Sydney homeowners and businesses restore faulty manual shutters. Whether it’s a spring replacement, tension adjustment, or full winder box repair — we carry all the tools and parts needed to fix it properly.
Our team is experienced with all makes and models, and we’re known for fast, honest service. Just have a look at our Google reviews to see why so many Sydney locals trust us.
Spring tension plays a huge role in how your roller shutter operates. If the balance is off, you’ll feel it — and left unattended, it can lead to costly damage or injury.
If you think your spring needs adjustment, save yourself the risk and hassle. Get in touch with Fix My Shutters for fast, professional service across Sydney.
