Black mold near AC vent: DIY or call a professional?« Back to Previous Page

Persistent black spots near an AC vent, especially after a leak, typically indicate an active mould colony that has penetrated the surface. Bleach only removes surface discolouration but does not address the moisture source or the root structure. In Dubai's high humidity, with AC systems running year-round, this internal moisture problem will continue to fuel growth.

For a situation involving a leak into the wall, a professional inspection is strongly advised. The visible spots are likely just the surface manifestation; the main colony is often hidden within the wall cavity or the AC ductwork itself. A proper inspection uses moisture meters and borescopes to assess the extent of damage behind the wall, which is critical to preventing structural issues and ongoing health concerns from airborne spores.

In the UAE, remediation must follow strict guidelines like the DM Code of Practice to ensure spores are contained and the underlying cause is fixed. While a small, surface-level patch might be managed with dedicated fungicidal cleaners, your case has a confirmed water source and recurrence, which moves it beyond a simple DIY fix. A certified inspector can provide a clear scope of the problem and a remediation plan based on lab-verified identification of the mould type.