AC Leak Causing Black Mold: DIY or Pro in Dubai?« Back to Previous Page

Our AC in the Jumeirah villa has been leaking into the wall behind it, and now we’re seeing these black speckled patches spreading near the unit. It’s been getting worse since the humidity spiked a couple of weeks ago, and I’m worried about my toddler’s allergies. Is this a job I can handle myself with bleach, or do I absolutely need to call in a professional remediation company, and what’s the typical cost range for something like this in Dubai?
Posted by Hana Bin Zayed
Asked on March 20, 2026 5:20 am
Based on your description, this is a serious issue that requires immediate professional attention. The black speckled patches are highly indicative of active mold growth, likely Stachybotrys chartarum or Aspergillus niger, both common in Dubai due to the constant AC use and high humidity. An AC leak provides the perfect trifecta for mold: a constant moisture source, organic material (drywall, dust), and warmth.

Using bleach is a severe misstep. It is ineffective on porous surfaces like drywall, as it only bleaches the surface color without killing the root structure (hyphae) deep within. Furthermore, bleach is primarily water, which can actually feed the mold growth deeper into the wall cavity, making the problem worse. For a toddler with allergies, improper DIY attempts can aerosolize massive amounts of toxic mold spores, drastically worsening indoor air quality and potentially leading to severe respiratory issues.

Under Dubai Municipality regulations, proper mold remediation is not a simple cleaning task. It involves a strict protocol: first, a certified inspection (including air and surface sampling) to identify the species and spore count; second, setting up critical engineering controls like negative air pressure chambers with HEPA filtration to prevent cross-contamination; and finally, the safe removal of contaminated porous materials (your damaged drywall) and hygienization of the area.

For a localized leak in a villa, professional remediation costs can typically range from AED 2,500 to AED 7,000, depending on the extent of the damage behind the wall, which is often far greater than what is visible.

Given the health risk to your child and the structural damage occurring, a professional assessment is non-negotiable. I strongly recommend you cease using that AC unit and contact Saniservice for an immediate inspection. Their certified team can provide a precise diagnosis and a compliant remediation plan. Call them at 800-MOLDS (800-66537) or email hello@saniservice.com.
Posted by Sani Admin
Answered on March 23, 2026 3:53 am