ᐅ My Kallax shelf developed cracks during the winter – is the material sensitive to cold?

My Kallax shelf, which I bought about two years ago, suddenly developed cracks this winter. The damage mainly appears along the edges of the shelves and looks like it was caused by temperature stress. Is it possible that the material of this shelf is sensitive to cold? I have the shelf in an unheated basement, and it did get quite cold there during winter. However, I’m not sure if the MDF material or the laminate layer can be affected in a way that causes cracking. Has anyone had similar experiences or can explain how susceptible the materials used in Kallax shelves really are to low temperatures? Thanks in advance for your insights!

Yvobe schrieb:
Could it be that the material of this shelf is sensitive to cold?

Kallax shelves are generally made from particleboard with a melamine or foil coating, and sometimes from MDF. From a technical perspective, these boards are not inherently sensitive to cold, but they are very sensitive to moisture and rapid temperature changes. Since your shelf is located in an unheated basement, the likely cause of the cracks is the expansion and contraction of the material due to temperature fluctuations combined with possibly increased humidity.

MDF and particleboard can become brittle in freezing conditions, which promotes cracking, especially along edges that experience more mechanical stress. Cold alone rarely causes cracks directly, but in combination with moisture and mechanical pressure, it can. I recommend placing the shelf in a warmer and drier room if possible, or maintaining a constant temperature and humidity level.

RENMA schrieb:
MDF and particleboard can become brittle in freezing conditions, which promotes cracking

I find that a plausible explanation, but I would like to ask in more detail: How exactly does brittleness manifest in these materials, and at what temperature does it really become critical? Are there reliable data on the operating temperature range for Kallax materials?

Yvobe schrieb:
I have the shelf stored in an unheated basement, where it did get quite cold during winter.

There is no doubt that temperature fluctuations can strain the material, but can that alone explain the cracks, or do mechanical stresses and possibly pre-existing damage from moisture play a more significant role? Perhaps the shelf was already under continuous tension for a long time.

I also wonder whether the laminate layer delaminated and exposed the underlying board directly to frost. If so, that would be problematic because the board would then be insufficiently protected against moisture.

Yvobe schrieb:
My Kallax shelf suddenly developed cracks this winter. Could the material be sensitive to cold?

That’s really annoying that your shelf is cracking now!! 🙂 I also have a Kallax in my basement, but in a somewhat warmer environment. I believe the material is indeed stressed by the cold and temperature fluctuations. Edges and transition areas are often weak points where the material deforms with temperature changes and eventually cracks appear.

Maybe try creating an environment with stable humidity and temperature, for example using a dehumidifier or a small heater in the basement. I have read that MDF becomes more brittle below 5°C (41°F) – and when moisture is involved, the material deteriorates. So it’s not necessarily a faulty piece, but the combination of material and conditions. Hopefully you can still save your shelf or at least prevent further damage! 🙂