AC Leak Causing Mold: DIY Fix or Pro Needed?« Back to Previous Page

That black spot pattern spreading from an AC leak is a classic sign of active mould growth, and the recent humidity spike is exactly what fuels it. In Dubai's climate, this is a very common issue due to condensation from constant AC use and high ambient moisture.

For a small area behind a wardrobe, attempting a DIY fix is high-risk. The visible spots are only the surface; the moisture has likely penetrated the drywall. Without proper containment, cleaning surface mould can release a large number of spores into your bedroom air. Over-the-counter sprays often bleach the mould white, making it invisible but leaving the root structure intact, so it returns quickly.

Professional remediation for a contained area like this is generally a straightforward process. It involves isolating the area with plastic sheeting, using HEPA air scrubbers to filter spores, safely removing the affected section of wall if necessary, and applying EPA-approved antimicrobial solutions. The critical step they provide is a post-remediation verification test to confirm spore counts have returned to normal levels.

The cost for a professional job is influenced more by the required safety protocols and testing than the square footage. For a small, contained leak, it is typically a more accessible service. Always request a detailed scope of work and ensure it includes post-remediation verification from a third-party lab—this is your proof the problem is solved.

Given the leak is ongoing, your immediate step is to have an AC technician repair the leak to stop the moisture source. Until then, the mould will continue to grow regardless of any cleaning attempted.