Hello everyone,
I have a rather unusual issue with my IKEA KALLAX shelf. After an unexpected power outage a few days ago, during which the heating in the apartment stopped working, I noticed that the surfaces and edges of the shelf feel slightly damp or clammy. It feels somewhat moist, but there are no visible signs of water damage like stains or mold. I suspect it might be moisture damage caused by condensation or increased humidity during the power outage.
Has anyone experienced something like this? Can a simple power outage actually cause moisture damage to a piece of furniture like the KALLAX? Or could there be another reason?
Thanks in advance for any tips or advice on how to reduce the moisture and prevent further damage.
I have a rather unusual issue with my IKEA KALLAX shelf. After an unexpected power outage a few days ago, during which the heating in the apartment stopped working, I noticed that the surfaces and edges of the shelf feel slightly damp or clammy. It feels somewhat moist, but there are no visible signs of water damage like stains or mold. I suspect it might be moisture damage caused by condensation or increased humidity during the power outage.
Has anyone experienced something like this? Can a simple power outage actually cause moisture damage to a piece of furniture like the KALLAX? Or could there be another reason?
Thanks in advance for any tips or advice on how to reduce the moisture and prevent further damage.
karlnar schrieb:
after an unexpected power outage a few days ago, during which the heating in the apartment stopped working, I noticed that the surfaces and edges of the shelf appeared slightly damp or moist.Hey, that’s really frustrating but quite common! When the heating goes off, humidity levels can rise quickly—especially in tightly sealed rooms with little ventilation. The KALLAX shelf made of wood fiberboard will naturally absorb some moisture.
My advice: make sure to ventilate well, ideally with cross-ventilation. This will help restore the air balance. Additionally, dehumidifiers might be helpful. 🙂
Don’t worry, this is usually only temporary, as long as it doesn’t last for hours and there’s no direct water exposure. The damp feeling comes from the wood fiber soaking up moisture like a sponge, even though no visible water collects.
kaju67 schrieb:
If the heating is turned off, humidity levels can quickly rise – especially in densely furnished rooms with little ventilation. That is fundamentally correct; however, I believe it is important to differentiate more precisely: a short-term rise in relative humidity can cause condensation, but dampness usually results from prolonged elevated moisture levels.
If the KALLAX shelf actually shows signs of persistent moisture, it should be checked whether other sources might be responsible. Humidity alone, caused by a brief power outage with heating failure, typically does not cause lasting moisture damage, as furniture made from this material should react accordingly.
Has anyone measured whether the surrounding humidity has actually increased significantly or if there are temperature differences that make the furniture colder and therefore more susceptible? Also, how old is the shelf, and is it placed against a rather cold wall?
A very interesting question, to which I would like to add some technical details and considerations for better understanding.
First, it is important to know that KALLAX shelves are made from medium-density fiberboard (MDF), which has some moisture absorption capacity. Although the MDF is sealed, the edges—where the material is exposed and unsealed—can absorb moisture.
A power outage that also disables the heating causes a drop in room temperature. If the surface temperature of the furniture falls below the dew point of the room air, condensation can form—this explains the “damp” feeling.
What matters now is:
- How long did the power outage last?
- What was the actual humidity level, and what is the average room temperature afterwards?
To better assess the situation, please check the room humidity as accurately as possible with a hygrometer and ventilate regularly. Avoid placing the shelf against exterior walls or in corners with poor air circulation.
If the edges have remained damp for an extended period, the material could swell and become damaged. For MDF, the limits are primarily related to prolonged exposure to moisture.
Has anyone else had similar experiences, especially during longer heating and power outages? I ask because I consider the duration and room climate control to be crucial factors here.
karlnar schrieb:
Surfaces and edges of the shelf feel slightly “damp” or moist
First, it is important to know that KALLAX shelves are made from medium-density fiberboard (MDF), which has some moisture absorption capacity. Although the MDF is sealed, the edges—where the material is exposed and unsealed—can absorb moisture.
A power outage that also disables the heating causes a drop in room temperature. If the surface temperature of the furniture falls below the dew point of the room air, condensation can form—this explains the “damp” feeling.
What matters now is:
- How long did the power outage last?
- What was the actual humidity level, and what is the average room temperature afterwards?
To better assess the situation, please check the room humidity as accurately as possible with a hygrometer and ventilate regularly. Avoid placing the shelf against exterior walls or in corners with poor air circulation.
If the edges have remained damp for an extended period, the material could swell and become damaged. For MDF, the limits are primarily related to prolonged exposure to moisture.
Has anyone else had similar experiences, especially during longer heating and power outages? I ask because I consider the duration and room climate control to be crucial factors here.
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