ᐅ My Kallax shelf is splitting at the corners despite careful assembly.

I recently purchased a Kallax shelving unit from IKEA, and despite very careful and precise assembly, the material is chipping at the corners. I only tightened the screws by hand and followed the instructions exactly, assembling the boards without forcing anything. However, after a short time, small chips have already appeared, especially along the edges of the shelves where they connect to the side panels. My question is whether this is normal for this product, if it could be related to the quality of the particleboard, or if I might have made a basic mistake during assembly that caused this damage. I would like to know if others have had similar experiences and if there are ways to repair or prevent these chips in the future.

The issue of small splinters appearing at the corner joints of Kallax shelves is unfortunately quite common, as the material is usually a coated particleboard that can easily chip if screws are tightened too much or if tools with sharp edges are used.

It is important to tighten the screws only by hand, as you did, and to make sure the holes are not damaged. A common mistake occurs when the parts are assembled too tightly or forcefully, causing stress in the board.

If the damage was already present upon delivery, I would recommend exchanging the shelf. For minor splinters, you can use edge protectors or repair the spots with wood filler.

In general, the stability of the Kallax design relies more on the overall construction than on thick particleboard panels, which explains the sensitivity to mechanical stress along the edges.

Eugeneki schrieb:
The phenomenon of small splintering occurring at the corner joints of Kallax shelves is unfortunately not uncommon

I would like to question this statement in general terms. Just because a product uses inexpensive materials, it shouldn’t automatically be considered “normally” prone to splintering without examining the cause more closely. Splintering at finished joints can have several causes: for example, incorrect screw lengths, inaccurate pilot holes, or over-tightening screws, which mechanically damages the material.

Tradra68 schrieb:
I only tightened all screws by hand and assembled the boards according to the instructions

That sounds reasonable, but I wonder whether the screws are specifically designed for the wood, or if the material already had pre-existing damage or a defective surface. Have you checked if the parts showed peeling or small cracks before assembly?

In my opinion, it would be beneficial if IKEA included a kind of assembly guide for users with detailed advice on critical areas to help minimize such damage.

To take a closer look at the issue with splinters on the corners of Kallax units, I want to share my experiences and tips for assembling particleboard furniture.

1. Preparation: First, check all panels for visible damage or unevenness before you start assembling. Even small cracks in the surface coating can cause chipping when screws are tightened.

2. Tools: If you use screwdrivers, make sure to use the right size and apply steady torque. Power drivers are fine, but only with low speed and a torque limiter.

3. Screws: Kallax often uses dowel or connector screws—these should not be too long to avoid damaging the material from behind.

4. Assembly: Take your time, keep the parts aligned evenly, and tighten the screws gradually. Tightening too quickly or unevenly can create localized stress.

5. Finishing: Small splinters can be gently smoothed with very fine sandpaper without affecting the appearance. If needed, use wood filler or color-matched repair markers.

Generally, the issue is less about the quality of Kallax itself and more about the delicate nature of the material. A bit of careful handling and targeted finishing often makes a big difference. If you like, I can provide a small assembly checklist as a PDF in the forum.