ᐅ Kallax is very wobbly after moving – what can I do?

Hello everyone,

I recently moved and completely disassembled and reassembled my Ikea Kallax shelving unit. Unfortunately, I’ve noticed that the Kallax is much more wobbly than before. It shakes and feels somewhat unstable, even though I have checked and tightened all the screws.

The unit is standing on a level floor, and I used the corner brackets. Still, it doesn’t feel secure, especially when I put weight on the shelves. My question is: Are there any specific tips or techniques to make a Kallax stable again after disassembly and reassembly so that it no longer feels shaky?

I would appreciate detailed advice, including if hidden fasteners or possible reinforcements are involved. Do certain parts need to be replaced, or is there some kind of maintenance that can be done?

Thanks in advance!

Gomini schrieb:
The shelf stands on a level floor, and I have used the corner brackets. Still, it does not feel secure

Good description, thank you for that! What you describe is unfortunately a common issue with Kallax after moving. These units are robust, but the joints and dowels in the wooden panels can lose strength after repeated disassembly and reassembly.

Here are a few important steps:

1. Loosen the screws again and apply some wood glue to the joints before re-tightening. Wood glue significantly improves the strength of the connection.

2. Check the alignment of all panels: sometimes the joints can shift slightly, causing play even when the screws are tight.

3. When assembling, make sure the dowel holes are clean and the dowels fit firmly. If the dowels are a bit loose, you can replace them or stabilize them with wood glue.

4. Adding extra brackets at the back or corners can help increase stability.

5. Measure to ensure the floor is truly level—even slight unevenness can cause tall shelves to wobble.

You mention that the brackets are installed, but did you use the original Ikea screws or replacements? Sometimes the screw material is decisive.

What kind of load will the shelf carry? Many books, plants, or rather light decoration?

If you like, I can offer more detailed advice if you describe the assembly more precisely or specify which screws and brackets you used.

The general recommendation is always: after moving, completely loosen all connections, apply high-quality wood glue to the joints, then reassemble and tighten them again.

This ensures that the connection will hold as well as new.

If all screws and brackets are tightened securely and the Kallax unit still wobbles, it may be because the sides or panels slightly warped during transport.

In that case, it is advisable to install additional reinforcing brackets at the corners. These are also available as flat brackets that can be attached inside without compromising the design.

Alternatively, small wooden strips can be screwed to the back panel to stabilize the entire shelving unit.

In addition to the measures mentioned, I recommend securing the Kallax shelf to the wall if this has not already been done. Ikea provides appropriate fixing materials that prevent tipping and significantly improve stability.

It is also important to check that all screws are tight and that none of the joints have any play. If the dowels or connector bolts are already damaged or worn out, replacing the affected parts is usually advisable, as these greatly affect stability.

Another option is to reinforce the back panel of the Kallax shelf—usually a thin particleboard—by adding small nails or screws from the inside if it has come loose. The back panel contributes significantly to lateral stability.

PLOMA schrieb:
Sometimes the joints get slightly misaligned, so even with tight screws there is some play.

I can only agree with that. Sometimes it feels like you’ve tightened everything properly, yet there’s still a little “wiggle” left – in the case of the Kallax, a useful trick is the “screw worm”: loosen a screw slightly, then slowly and systematically tighten it again. This often causes small gaps to close on their own.

Also, a neat solution is to use a few felt pads under the shelf. They provide better stability and often help reduce creaking. Kind of like sneaker soles for furniture 😎.

KAMERON schrieb:
Another option is to secure the back panel of the Kallax shelf—usually a thin particleboard—further from the inside with small nails or screws

Interesting point, but it’s important to be careful not to alter the tension structure of the back panel in a way that could cause it to warp. These thin back panels are sometimes not designed to withstand significant stress.

Additionally, I think it’s crucial to identify the exact cause of the rattling. Is it really just a loose joint, or could the floor beneath the shelf be slightly flexible? Possibly with wooden floorboards or laminate?

This should be thoroughly checked before making any adjustments, as sometimes even loose books or objects inside the shelf can be the reason for the rattling.