How to permanently remove mold from AC damp wall?« Back to Previous Page

The AC unit in our master bedroom in Jumeirah Park has been leaking a bit, and now we’re seeing black spots on the wall behind the curtain. I wiped it down with vinegar, but it came back in just a couple of weeks, and I’m worried it’s making my allergies worse. What’s the most effective way to kill it for good and how can I stop the AC from causing this dampness again?
Posted by Geeta Sen
Asked on April 3, 2026 1:16 am
The black spots you describe are a classic indicator of active mold growth, a common issue in Dubai due to the high humidity and constant AC use. The recurrence after a vinegar wipe confirms the growth is not just surface-level; the hyphae (root structures) have penetrated the porous wall material. For a permanent solution, a multi-step remediation process is required.

First, the moisture source must be addressed. The AC unit leak is likely due to a clogged condensate drain line or a faulty drain pan, which is extremely common here as dust and sand accumulate in the system. A licensed AC technician needs to service the unit to clear the blockage and ensure proper drainage, stopping the dampness at its source.

For the mold itself, DIY methods like vinegar or bleach are insufficient and can spread spores. The effective, permanent removal process involves:
1. Containment: Sealing the area with plastic sheeting to prevent cross-contamination.
2. Removal: Physically removing the affected drywall or plaster if the penetration is deep, which it likely is.
3. HEPA Vacuuming & Abrasive Cleaning: To remove all spores from the remaining surface.
4. Antimicrobial Application: Using professional-grade, non-toxic biocides to eliminate residual mold and inhibit future growth.
5. Hygienization: Applying a protective coating to the treated area.

Given your allergy symptoms and the location in a bedroom, I strongly recommend a professional inspection. UAE regulations, particularly in Dubai, emphasize proper containment and disposal of moldy materials to protect occupant health. Our certified inspectors at Saniservice can conduct a thorough assessment, identify the exact species, and execute a Dubai-mold-code-compliant remediation. Please call us at 800-MOLDS (800-66537) or email hello@saniservice.com to schedule an inspection and prevent this health hazard from returning.
Posted by Sani Admin
Answered on April 4, 2026 5:51 pm