Black mold from AC leak: DIY fix or call pro?« Back to Previous Page

Our master bedroom AC unit in our Jumeirah apartment has been leaking a bit, and now we're seeing a few small black patches on the wall behind the curtain. I thought it was just a stain, but it’s been spreading slowly over the last couple of weeks and the room has that distinct damp smell. Is this something I can treat myself with bleach, or do I absolutely need to call a professional mold removal company, and if so, what's a rough cost estimate for a job like this in Dubai?
Posted by Yasmin Bin Zayed
Asked on March 23, 2026 3:44 am
Based on your description of a recurring AC leak, visible spreading black patches, and a persistent damp smell, this is not a situation for a DIY fix. The combination of factors indicates a significant moisture issue that requires professional intervention.

The black discoloration is likely Stachybotrys chartarum or another toxigenic species, which thrives on the cellulose in wet drywall and poses health risks. Bleach is a surface-level treatment that is ineffective on porous materials like wallboard. It addresses the cosmetic stain but not the root cause or the hyphae (roots) growing deep within. Furthermore, the UAE's high ambient humidity and year-round AC use create a perfect environment for rapid mold colonization if a moisture source is present.

For a situation like this in your Jumeirah apartment, a professional inspection and remediation process is mandatory. The procedure involves:
1. Identifying and rectifying the AC leak source.
2. Containing the affected area to prevent cross-contamination.
3. Safely removing and disposing of contaminated porous materials (drywall, insulation).
4. HEPA vacuuming and abrasive cleaning of non-porous surfaces.
5. Applying EPA-approved antimicrobial solutions to eliminate residual spores.
6. Verifying the cleanup's success through post-remediation testing.

Regarding cost in Dubai, for a contained area from an AC leak, you can expect a professional remediation service to range from AED 1,500 to AED 4,000. This estimate depends on the extent of the damage behind the wall, which can only be confirmed with a thorough inspection.

Given the health risks and potential for structural damage, I strongly recommend you cease using the AC unit and contact a certified professional immediately. For a certified inspection and a precise quote, please call Saniservice at 800-MOLDS (800-66537) or email hello@saniservice.com. Their team is equipped to handle this in full compliance with Dubai Municipality's environmental health and safety standards.
Posted by Sani Admin
Answered on March 25, 2026 5:12 pm