AC leak causing black mold: DIY fix or professional cost?« Back to Previous Page

That black spotting is almost certainly mold growth, and it's a common issue here due to our high humidity and AC condensation. An AC leak provides the constant moisture mold needs to thrive, especially behind furniture where air doesn't circulate.

Using bleach is not recommended. It's about 90% water, which can feed the mold roots deep in porous surfaces like drywall or plaster. Bleach also only bleaches the surface visible color and releases harmful fumes without addressing the root cause. For a very small, surface-level patch on a non-porous tile, a diluted vinegar solution can sometimes suffice, but your situation with an active leak and wall penetration is more serious.

The primary step is to stop the moisture source. You must have the AC leak repaired by a qualified HVAC technician first; otherwise, the mold will return regardless of cleaning. For the remediation itself, the cost depends entirely on the extent of the damage behind the wardrobe. If the moisture has penetrated the wallboard, the affected section likely needs to be carefully removed and replaced to prevent structural weakening and regrowth.

Professional assessment is strongly advised here. They will check for hidden spread and contain the area during removal to prevent spores from dispersing into your living space. In Dubai, reputable providers should follow international guidelines like the IICRC S520 and can provide a post-remediation verification test to confirm the space is clean. You can request an itemized assessment from a certified mold remediation company to understand the scope and associated costs before any work begins.