ᐅ KALLAX feels unstable after assembly – any tips for improving stability?

Created on: 14 Sep 2021 08:37
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Debora
Hello everyone, I recently assembled a KALLAX shelf unit from IKEA, but I noticed that the shelf feels quite unstable after assembly. Although all screws and dowels are properly installed, the shelf noticeably wobbles when lightly bumped. I’m wondering if anyone else has experienced this or if I might have made a mistake during assembly.

Are there any specific tips or tricks to improve the stability of the KALLAX without having to alter the entire structure? I’m particularly interested in whether there are ways to secure the shelf to the floor or the wall, or if adding additional braces would be helpful.

Perhaps users with experience in furniture building or DIY have practical recommendations for enhancing the shelf’s stability in everyday use. Thanks in advance for your help!
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JEREMIAH38
14 Sep 2021 13:53
I find this topic interesting because I have experienced something similar and know how frustrating it can be.
Mufato schrieb:
Wall mounting is mandatory

That’s true; wall mounting provides stability. However, sometimes it’s not feasible, for example in rental apartments. In such cases, you can also reinforce furniture internally using glued brackets or metal profiles.

Patience and understanding that furniture always involves compromises also help.
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REOHEINRIC
15 Sep 2021 07:22
The fact is: The KALLAX is generally designed as a light-duty shelf after assembly. For improved stability, I recommend:

1. Careful installation of all brackets and screws, including the back panel.
2. Using the original back panel not only as a cover but as a structural reinforcement.
3. Securing the unit to the wall with appropriate anchors and screws — these components are part of the safety recommendations for KALLAX.
4. Optional: Reinforcement by attaching wooden slats diagonally on the back.

Together, these measures result in a noticeable increase in stability.
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Lidan56
15 Sep 2021 09:15
If wall mounting is not possible, you should definitely equip the feet with rubber or felt pads. This reduces slipping and increases stability.
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Debora
15 Sep 2021 09:59
Thanks already for the helpful contributions!
Tinaneo schrieb:
Did you really use all the supplied brackets and fasteners?

Yes, as far as I could tell, I used all the brackets and attached the back panel completely.
Victor54 schrieb:
Check with a spirit level whether the shelf is really straight

I placed the shelf on a floor with minimal unevenness, but I held the spirit level next to it, and the shelf appears to be mostly level.

I think I will try wall mounting and also follow the idea of adding additional wooden strips for reinforcement.

Are there any other recommendations to increase the load capacity for books or heavy decorations? For example, special screws or fastening methods?
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Tinaneo
15 Sep 2021 11:03
Regarding your question, Debora:
Debora schrieb:
Are there any recommendations to increase the load capacity for books or heavy decorations?

Yes, you can install metal shelf brackets that are stronger and wider than the original ones. Additionally, wooden reinforcements can be embedded into the side panels, such as small battens that are glued or screwed in to better distribute the load.

It is also important to ensure the weight is evenly distributed—preferably several smaller stacks of books rather than all in one spot.

Finally, the shelves themselves can be reinforced, for example, with thin metal profiles attached to the underside to prevent sagging.
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rebufar
15 Sep 2021 12:29
I want to pose a provocative question:
Debora schrieb:
Are there any special tips or tricks to improve the stability of the KALLAX without having to change the entire structure?

Why not just buy something solid right away? Constantly tinkering with inexpensive shelving units to make them stable takes time and patience. The KALLAX might look nice, but what’s the point if it wobbles before you even fully load it?

Sometimes the lowest price ends up being the most costly effort.

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