ᐅ KALLAX Side Panels of Different Heights – Everything Already Installed, What Can Be Done?

Hello everyone, I am facing a somewhat tricky issue with my IKEA KALLAX shelving unit. I recently installed the side panels and noticed that they have different heights – at least it feels that way, even after measuring again and checking the assembly instructions carefully. The shelving unit is already fully assembled and installed, which of course makes the situation more difficult. My question is: what can I do now to even out or correct this height difference without having to take the unit apart completely? Are there any proven tips or tricks to compensate for manufacturing tolerances? If anyone has experience with KALLAX side panels being uneven in height, I would greatly appreciate any advice or solutions. Thanks in advance!

Minluis schrieb:
I am facing a somewhat tricky problem with my IKEA KALLAX shelf. I recently installed the side panels and noticed they have different heights.

That’s frustrating, but it’s unfortunately not an uncommon issue with modular furniture like the KALLAX. Ideally, the side panels should be identical within a millimeter range, but manufacturing tolerances can cause slight variations right from the factory.

First, you should check whether the difference is really due to the side panels or if the shelves themselves are unevenly positioned. A spirit level can help to identify the cause. If the shelves can be adjusted slightly, try that first.

If the difference is limited to the side panels, one solution would be to sand down or fill one side, but this could affect the stability and appearance of the unit. Alternatively, you can use small wedges or shims under the lower side, assuming the shelf rests on the floor. It’s important to ensure the shelf remains stable overall.

If everything is already fully assembled and fixed, my advice is to first check whether one side is pressing against the back panel or the floor and adjust there before making significant changes to individual parts.

Could you please specify the exact height difference—is it within a few millimeters or more? Also, how exactly did you mount the side panels (screws, dowels, glue)? That information would help to address your situation more precisely.

Minluis schrieb:
What can I do now to even out or fix this height difference without having to take the entire shelf apart?

To be honest: why would you ever need to take the whole shelf apart? IKEA furniture, especially KALLAX, thrives on modular customization, but this “finished solution” mindset has caused us a lot of frustration too many times.

Why not just accept that a few millimeters (1/8 inch) of difference are part of the character of the piece and live with it? Those insisting otherwise are often just chasing a “perfect” image that the manufacturer never promised.

If it really bothers you: slide in a shim underneath, trim it slightly, or better yet, use wood glue and carefully sand down the piece to fit.

I mean, IKEA is not high-end carpentry—these small inaccuracies are normal, and they even add some charm. If you’re not willing to be flexible during assembly, what else is left? Troubleshooting until exhaustion? 🙂

I don’t want to provoke, but this sounds like the classic “complaining” scenario about furniture that actually works quite well. Try to stay pragmatic instead.

Dilen schrieb:
If the shelves can be easily adjusted, try that first.

I can really understand how frustrating this is, especially when the furniture is already assembled and you don’t want to take it apart. I once had a similar problem with a KALLAX, where the side panels were slightly different heights – it really annoyed me at first.

What helped me was a combination of lightly sanding the lower side and adding small strips of foam rubber under the bottom of the shelf to make the adjustment as invisible as possible without compromising stability.

The important thing is not to get upset – especially with KALLAX, the material is quite sturdy and forgiving of small adjustments. If you take some time and measure carefully, you can definitely fix it.

Maybe this practical approach will help you. And don’t worry – most of the time, such small differences are barely noticeable unless you look very closely! 🙂