AC mold from leaking unit: DIY or professional cleanup?« Back to Previous Page

The AC in my Dubai Marina apartment has been leaking a bit into the wall behind it, and now I’m seeing a large patch of black mold spreading there. It’s been getting worse over the last few weeks since the humidity spiked. I’m worried about health risks and it ruining the walls, but I have no idea what to expect cost-wise for a proper remediation. Is this a job I can tackle myself with bleach spray, or do I absolutely need to call a professional company to handle it?
Posted by Joseph Walker
Asked on March 17, 2026 7:53 am
This is a serious situation that requires immediate professional attention. In the high-humidity climate of Dubai, a leaking AC unit creates a perfect breeding ground for mold, particularly the black mold (likely Stachybotrys chartarum or Aspergillus niger) you are describing. This is not a DIY job for several critical reasons.

Firstly, applying bleach or consumer-grade sprays is ineffective and dangerous. Bleach only bleaches the surface color and does not kill the root structure (hyphae) penetrating your gypsum board. The high water content in bleach can actually feed the mold deeper within the wall. More importantly, disturbing the mold without proper containment and professional-grade HEPA filtration will aerosolize toxic spores throughout your apartment, significantly increasing the health risk of respiratory issues, allergic reactions, and mycotoxin exposure.

Under Dubai Municipality regulations, proper mold remediation requires a certified protocol: isolating the contaminated area with negative air pressure, safely removing and disposing of affected porous materials like drywall, and using industrial antimicrobials to treat the cavity. The source—the AC leak—must also be identified and repaired by a certified HVAC technician to prevent immediate recurrence.

For a situation of this scale, a professional inspection and remediation by a company like Saniservice is absolutely essential. We are equipped with thermal imaging to map the full extent of moisture, air sampling to identify spore types and concentrations, and the technology to remediate according to international IICRC standards. Cost varies based on the extent of damage but addressing it now is far cheaper than repairing structural damage later.

Do not risk your health or your property. For a certified assessment and remediation quote, please call our experts at 800-MOLDS (800-66537) or email hello@saniservice.com.
Posted by Sani Admin
Answered on March 19, 2026 3:38 am