ᐅ Are Kallax shelves prone to chipping when reassembled – is this normal?

Hello everyone, I recently took apart a Kallax shelving unit because I wanted to rearrange it. When reassembling, I noticed that some of the shelves have slight splintering along the edges, and in some cases, small chips. The shelves were undamaged before and were not subjected to heavy loads.

My question is: Is it normal for shelves—especially in Kallax units—to splinter during reassembly, or should this not happen? Could this be related to the material, or is it more due to the way it is assembled or handled? Has anyone had similar experiences and perhaps advice on how to prevent this? I would appreciate technical insights or practical tips, as I would prefer not to have to frequently buy replacement shelves.

Fusedi schrieb:
Is it normal for the shelves to chip when reassembling—especially with Kallax shelving units?

That’s a very valid question, especially considering that Kallax shelves are made from medium-density fiberboard (MDF) with a decorative laminate. The MDF edges are naturally more prone to chipping if they are not properly protected or treated. During assembly, it is particularly important how the shelves are guided and whether the pre-drilled holes or slots provided by the shelf unit are used.

If you push the shelves in with too much force or at an awkward angle, stress points can develop that may cause the material to chip—especially at the edges where the MDF board is thinnest and least protected. It also matters whether the shelves were properly positioned before or if repeated removal and reinsertion has already weakened the material.

Fusedi schrieb:
Could this be related to the material or more to the assembly method?

The material definitely plays a role. MDF is sturdy but less resistant to sharp mechanical stresses compared to solid wood, for example. Chipping along the edges usually results from fiber breakdown in the MDF or surface damage. Temperature and humidity can also affect the fiber condition, which becomes more significant with older shelves or boards stored for a long time.

I therefore consider it important to assemble the unit with some care—gently and especially making sure to insert the shelves straight. If you often experience this problem, it can help to protect the edges with a thin plastic edge trim or a suitable coating.

Did you happen to assemble the unit on a very hard surface? That also influences stability when inserting the shelves. If the shelves already had small cracks around the drilled holes or edges, that could be another cause of damage.

I look forward to your feedback on what you paid particular attention to and whether you have an idea how the chipping might have occurred.

Oh, I know that feeling! I had the same issue with my Kallax when I modified it – it can be a bit annoying. 🙂 But with some patience and care, you can definitely manage it well! You really have to make sure to slide the shelves in slowly and straight. If you push them in too fast or at an angle, the risk of chipping is much higher.

What I also did, and it helped a lot: I lightly sanded the edges with very fine sandpaper before putting the shelves back in. This smooths the surface a bit and reduces the chance of small chips breaking off. Additionally, I sometimes wiped the shelves with a damp cloth if there was dust or small debris – this improves grip and reduces scratches.

Gafiel schrieb:
If you encounter this problem frequently, it can help to protect the edges with a thin plastic edge strip or a suitable coating.

I think that’s a great idea too! A small extra layer can make a big difference. I’m sure if you keep at it and stay careful, you’ll get it done perfectly. Good luck! 🙂

Fusedi schrieb:
I would appreciate any technical assessments or practical advice.

I think it’s great that you brought this up, as I had similar concerns in the past. It’s frustrating when seemingly simple furniture parts start to splinter right away during reassembly.

One question: Were you assembling the unit alone, or did you have help? Sometimes, different handling techniques or uncoordinated movements can cause the shelves to be put together slightly crooked, which puts disproportionate stress on the edges.

If you take the shelf apart and reassemble it frequently, the wood—especially MDF-based shelves—can wear out faster. A project intended for mostly one-time assembly actually suffers over time from frequent handling.

NUPIN schrieb:
You really have to be careful to slide the shelves in slowly and straight.

I agree with that. At first, I wasn’t sure if I was perhaps handling the parts too roughly. Since then, I try to be gentler with the edges and consciously rotate or align the parts before inserting them.

So, if the shelves aren’t brand new, it’s quite likely that the surface and edges have been mechanically stressed by handling. Even without any ill intent, the material tends to break down more at those spots.

My tip: If you plan to disassemble and reassemble the shelf frequently, it might be worth considering an additional edge protector strip, which you can find for DIY projects or at hardware stores. This can help protect the original edges and reduce the chance of damage.

I hope this helps a bit and that you find the best way to keep your Kallax shelves in good condition for the long term 🙂