ᐅ Kallax as a Shoe Rack Mold Issue – Does Anyone Else Experience This?

Hello everyone,

I have been using the Kallax shelving unit from IKEA as a shoe rack in my basement for some time now. Unfortunately, I have noticed a problem that I consider quite serious: mold is forming on the back panels and inside the compartments, especially in the lower sections where the shoes are stored. My guess is that the combination of the damp basement temperature, poor air circulation within the compartments, and the lacquered wood fiberboard of the Kallax modules creates favorable conditions for mold growth.

Does anyone else have experience with this mold issue on or inside Kallax shelves when used as shoe racks, particularly in more humid rooms? Are there any practical solutions to reduce mold formation, such as improved ventilation, surface treatment, or alternative options? Maybe someone has tips on how to use the Kallax shelving without encouraging mold growth afterward?

I look forward to your experiences and suggestions!

Hello NONPAULINA,

I am very familiar with the problem of Kallax cabinets in damp areas. The drawbacks of wood fiberboard in basements or rooms with high humidity are often underestimated.

What happens exactly? The wood fiberboards absorb moisture, reduce breathability, and create a damp surface. Combined with shoes that are often still slightly damp and especially warm, this creates an ideal microclimate for mold spores.

My recommendation is a three-step approach:
1. Ensure sufficient air circulation: slightly raise or prop up the shelves so air can reach behind the back panels.
2. Treat surfaces with a transparent, breathable anti-mold coating (e.g., special wood protection for damp rooms). Never use a completely airtight seal, as moisture can remain trapped inside and worsen the problem.
3. Alternatively, equip the area with small dehumidifiers or silica gel packs.

Important: Regular ventilation and storing shoes as dry as possible. Mold usually develops only when there is consistently high humidity and stagnant air.

This should significantly reduce the risk. If possible, I would only use Kallax cabinets in basements when moisture levels are well controlled.

Good luck!

SauDietmar schrieb:
My tip would be a three-step approach...

I can only confirm that. I had the same problem just a few months ago, even though my basement is not really that damp. It was really annoying when you open the Kallax shelf and immediately get that musty, moldy smell. I then placed small dehumidifiers and made sure not to store completely wet shoes inside.

The combination of poorly ventilated compartments and the Kallax back panel almost caused a small 'mold shock' for me.

So your question is justified. I think many people underestimate the issue because Kallax furniture seems quite sturdy, but it’s not really suitable for damp, dark basements. Maybe IKEA should better indicate the suitability for certain environments.

I hope you find a solution; every tip helps! 🙂

Kallax is not suitable for damp rooms. If there is a risk of mold:
- Place the unit on feet to allow air circulation.
- Paint the back panels with mold-resistant coating.
- Store shoes in a dry place.

NONPAULINA schrieb:
My guess is that the combination of the damp basement temperature, limited air circulation inside the compartments, and the rather lacquered fiberboard of the Kallax modules creates ideal conditions for mold.

Interesting approach, but I believe the problem runs deeper: The real mistake was designing a piece of furniture that clearly isn’t intended for such environments, yet users still expect it to work there. Kallax is definitely stylish, no question, but if it ends up fostering mold in the basement, that’s more of a failure on IKEA’s part than on us users.

I also wonder if the issue is being exaggerated. How many people actually store damp, dirty shoes inside an unventilated Kallax unit? This kind of pseudo-subcultural scenario, to me, is part of the problem. Instead, the focus should be on usage habits. Dry and clean shoes properly before storing them, and mold won’t develop.

From my perspective, this is more symptomatic of the modern DIY furniture world. Quick assembly, no thinking, then surprise when something goes wrong. Of course mold grows under these conditions. If anyone wants to call it a “Kallax system failure,” fine—I say it’s 70% user error.