ᐅ My KALLAX shelf has an uneven top surface – how can I level it?

Hello everyone,

Some time ago, I bought a KALLAX shelving unit from IKEA, which I am generally very happy with. However, I noticed that the top surface is not completely flat. Specifically, there are small uneven spots, so decorative items, for example, don’t sit steadily and wobble. I have checked whether the floor where the unit stands is perfectly level, and it is.

My question: How can I level the top surface of the KALLAX shelving unit without negatively affecting its stability or appearance? Does anyone have experience with this or good tips on how to best even out small irregularities on a surface-coated particleboard?

Thanks in advance for your ideas!

Gifilo schrieb:
The top surface is not completely flat… uneven spots… decorative items wobble

I can totally understand how frustrating that is. I had a similar issue with an older shelf, which really made it difficult to place small items securely. When I tried to fix it, I used a combination of light sanding and furniture sliders to adjust the surface. It was important for me not to damage the shelf and to keep its appearance intact.

Maybe using a fine sandpaper, around 220 grit, could help gently level the spots? But be careful with the surface so you don’t damage the decorative laminate. I took it slow and checked the progress frequently.

What does your shelf look like? Is it painted or more like a veneer finish?

Hello Gifilo,

I’d like to add a bit to nojaus' suggestion. The KALLAX shelf is usually made of coated particleboard – the surface is relatively thin and can be easily damaged if too much pressure is applied.

As an alternative to sanding, you could use a thin leveling compound, for example wood filler, which can be painted or touched up with a suitable color after drying. This way, you can fill in irregularities and then sand it smooth.

If you want to place decorations on it, you might also consider using a thin, smooth wooden board or a glass plate as a cover, which completely avoids the issue.

Have you already checked whether the individual parts of the shelf fit together properly? Sometimes unevenness can also result from slightly misaligned pieces during assembly.

Gifilo schrieb:
How can I level the top… without negatively affecting stability or appearance?

That is, of course, the key issue. Generally, you can only mechanically even out irregularities on a coated surface to a limited extent without damaging the finish.

Why is the unevenness occurring in the first place? Could it be due to deformation from moisture or shipping, or is the shelf simply not assembled correctly?

If the latter is the case, I would first double-check the assembly and make minor adjustments.

If a material defect is the cause, adding a thin cover panel (plywood, MDF, or glass) would probably be the best solution, as other methods involve risks.

I would also check whether IKEA offers an exchange in your case due to a material defect.

If there are small uneven spots and I don’t want to spend much effort, I simply use self-adhesive felt pads. They can help level the support surface or at least reduce wobbling.

Otherwise, a glass plate on top is generally the best solution – it also looks nice.

klo61 schrieb:
Wood filler that can be painted or touched up with a matching color after drying

Thanks for this tip, I hadn’t considered it before. I once had a similar problem, and a good wood filler really helped me as well.

But I understand that, especially as a beginner, you want to be cautious at first. I recommend testing it on an inconspicuous spot beforehand.

What do you think about applying a thin protective film after treatment, in case small scratches occur? That might increase the protection.

Gifilo, do you already have a specific budget or tools ready? Then we could be more precise.