How to treat and prevent mold behind wardrobe?« Back to Previous Page

We've lived in our Marina apartment for two years and just noticed black speckles growing along the bottom of the wall behind our bedroom wardrobe. It’s on an interior wall and the room always feels a bit damp, especially with the AC running constantly. I’m worried it’s going to get worse and start affecting our health. What’s the most effective way to treat this existing mold and prevent it from coming back for good?
Posted by Julia De Jong
Asked on March 29, 2026 2:24 pm
Good question. This is a very common issue in Dubai apartments, especially in high-humidity coastal areas like Marina. The combination of constant AC use creating cold surfaces and the high ambient humidity outside creates perfect conditions for condensation and mold growth on interior walls, particularly behind large furniture that restricts airflow.

First, do not simply wipe it with bleach. This will only temporarily remove the visible stain (the melanin) but not kill the root structure (hyphae) of the mold. It can also aggravate the spores into the air.

Here’s the effective way to handle it:

1. Assessment & Isolation: Carefully move the wardrobe away from the wall. Do not disturb the mold growth aggressively. For a small area (less than 1 sqm), you can manage it yourself. If it's larger, or if you have respiratory issues, stop and call a pro immediately.

2. Treatment: You need a proper fungicidal coating, not just a supermarket spray. For a DIY approach, a solution of distilled white vinegar or a certified moldicide (available at hardware stores) is more effective than bleach. Apply it generously, let it dwell for 10-15 minutes to penetrate and kill the roots, then wipe clean with disposable cloths. Bag and dispose of all cleaning materials.

3. The Critical Step - Identify & Fix the Moisture Source: This is what prevents it from coming back. The damp feeling indicates condensation. The wall is likely a cold bridge. The constant AC is cooling the wall surface below the dew point, and moisture from the air is condensing on it. Behind the wardrobe, the stagnant air makes it worse.

* Increase Airflow: Leave a 2-3 inch gap between the wardrobe and the wall. Consider installing vented panels or feet on the furniture.
* Control Humidity: Ensure your AC unit is set to a reasonable temperature (22-24°C) and not excessively cold. Run the AC's "dry" mode regularly to dehumidify. Using a standalone dehumidifier in the bedroom, especially during more humid months, is a highly effective solution.
* Check for Leaks: While less likely on an interior wall, it's prudent to check for any hidden plumbing leaks from adjacent bathrooms or the AC condensate drain line being blocked.

For a persistent problem or for complete peace of mind, a professional inspection is recommended. We use thermal imaging cameras to precisely identify cold spots and moisture meters to quantify the dampness, ensuring the fix is permanent. If you'd like us to take a look, you can call our team at 800-MOLDS or 800-66537 for a comprehensive assessment.
Posted by Sani Admin
Answered on March 31, 2026 7:05 am