Hello everyone, I have noticed that small cracks develop quite quickly in the material of my IKEA KALLAX shelving units, mostly along the edges and especially with frequent use. I am curious: why do these small cracks form so quickly in KALLAX units? Is it due to the material quality, the manufacturing process, or possibly the assembly? I have used the shelves normally, without any particularly heavy or unusual loads. Are there others who have observed the same or who can provide a professional explanation? Thanks in advance!
Hello Robinke, that is quite an interesting question and one that comes up fairly often. KALLAX shelves are usually made from engineered wood panels, often particleboard with a melamine or foil finish. These materials tend to develop cracks when exposed to moisture fluctuations and mechanical stress. This mainly occurs at edges that may not be sufficiently protected.
All three factors can play a role: The material quality is not comparable to solid wood and can therefore crack more easily. The workmanship (edge protection, surface coating) also has a strong impact on stability. And incorrect or improper installation can introduce stresses into the material that promote cracking.
If your KALLAX is used normally, the causes are usually related to the material and workmanship. A tip: try to distribute heavy items across multiple levels and avoid concentrated loads on the edges.
Robinke schrieb:
Is this due to the material quality, the workmanship, or possibly the installation?
All three factors can play a role: The material quality is not comparable to solid wood and can therefore crack more easily. The workmanship (edge protection, surface coating) also has a strong impact on stability. And incorrect or improper installation can introduce stresses into the material that promote cracking.
If your KALLAX is used normally, the causes are usually related to the material and workmanship. A tip: try to distribute heavy items across multiple levels and avoid concentrated loads on the edges.
I understand your frustration, Robinke! I also noticed small cracks on my KALLAX after a short time – it was really disappointing because I had been quite careful with the shelf.
I can definitely confirm that! It seems like the panel is simply too thin at the edges, and the protection hardly holds up. Especially when sliding it around or if something bumps into it, these small cracks appear very quickly.
I also keep wondering if IKEA uses a simpler, cheaper version that shouldn’t be so fragile for the price. Still, I don’t want to give up on it completely because the design is very practical. Maybe others have tips on how to care for or protect the material?
dunitan schrieb:
This mainly happens at edges that may not be sufficiently protected.
I can definitely confirm that! It seems like the panel is simply too thin at the edges, and the protection hardly holds up. Especially when sliding it around or if something bumps into it, these small cracks appear very quickly.
I also keep wondering if IKEA uses a simpler, cheaper version that shouldn’t be so fragile for the price. Still, I don’t want to give up on it completely because the design is very practical. Maybe others have tips on how to care for or protect the material?
For clarification: KALLAX units are made of particleboard covered with a thin melamine coating. This combination is known to develop cracks at the edges when exposed to moisture and mechanical stress. The edges are often only protected by a thin edging, which can tear under heavy use or uneven, localized pressure.
Poor installation can cause stress points, but long-term experience shows that the main factor is the material characteristics. Particleboard has lower flexibility and lacks genuine wood fiber bonding, so cracks are a typical weakness during use. Humidity also plays a role, as the boards can easily swell or shrink.
To avoid such cracks, careful installation is recommended, excessive room humidity should be avoided, and if necessary, edges can be sealed with protective treatments.
Robinke schrieb:
Is this due to material quality, workmanship, or perhaps the installation?
Poor installation can cause stress points, but long-term experience shows that the main factor is the material characteristics. Particleboard has lower flexibility and lacks genuine wood fiber bonding, so cracks are a typical weakness during use. Humidity also plays a role, as the boards can easily swell or shrink.
To avoid such cracks, careful installation is recommended, excessive room humidity should be avoided, and if necessary, edges can be sealed with protective treatments.
I would like to critically follow up here and question some assumptions regarding material quality and workmanship.
That may be true, but what exactly does "not adequately protected" mean? Are the edges unevenly finished, or is the issue more related to the gluing?
Also, you often mention the influence of moisture, but do we have reliable evidence that this is the cause for the affected users?
I also think blaming the assembly as the cause is premature based on the reports. Stress cracks in wood-based materials usually occur due to internal stresses or environmental factors, not primarily because of assembly errors.
In my opinion, we should consider these points more carefully and perhaps conduct more detailed investigations into the exact stress mechanisms and production processes before quickly condemning the overall material quality or design.
dunitan schrieb:
This mostly happens at edges that may not be adequately protected.
That may be true, but what exactly does "not adequately protected" mean? Are the edges unevenly finished, or is the issue more related to the gluing?
Also, you often mention the influence of moisture, but do we have reliable evidence that this is the cause for the affected users?
I also think blaming the assembly as the cause is premature based on the reports. Stress cracks in wood-based materials usually occur due to internal stresses or environmental factors, not primarily because of assembly errors.
In my opinion, we should consider these points more carefully and perhaps conduct more detailed investigations into the exact stress mechanisms and production processes before quickly condemning the overall material quality or design.
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