How to permanently remove black mold from under AC leak?« Back to Previous Page

Based on your description, this is a serious contamination event. The presence of black, fuzzy growth on both the carpet backing and the concrete substrate indicates a significant and established moisture problem. In Dubai's climate, with high ambient humidity and year-round AC operation, such leaks create an ideal environment for rapid mold proliferation, including species like Stachybotrys chartarum (often referred to as "black mold").

The absolute best way to handle this is to first address the source. You must have the AC unit serviced immediately to stop the leak; otherwise, any cleaning efforts will be futile. For the remediation itself, this is not a typical DIY cleaning job. The mold is on a porous material (carpet) and a semi-porous one (concrete). The carpet and underlay likely cannot be salvaged and must be properly disposed of to prevent cross-contamination and aerosolization of spores during removal.

The concrete must be mechanically cleaned, treated with an EPA-approved antimicrobial agent, and then sealed. Simply wiping it is insufficient, as the hyphae (root-like structures) penetrate the microscopic pores of the concrete. Attempting this yourself without professional-grade containment, air scrubbers, and personal protective equipment (PPE) risks severe health effects from spore exposure and widespread contamination in your home.

Given the extent you've described, professional inspection and remediation are strongly advised to ensure it is completely eradicated and to verify the indoor air quality post-cleanup. For a permanent solution that complies with local health and safety standards, I recommend contacting our specialists at Saniservice for a comprehensive assessment. Call 800-MOLDS (800-66537) or email hello@saniservice.com. Our certified team can handle the safe removal, sanitization, and restoration to ensure the mold does not return.