How to treat AC leak mold behind the wall?« Back to Previous Page

Based on your description of a water leak from the AC unit, a visible black spot on the skirting board, and a persistent damp smell, it is highly probable that you have active mold growth. The climate in Dubai, with its high humidity and year-round reliance on air conditioning, creates a perfect environment for mold, especially when condensation or leaks provide a constant moisture source. The smell indicates microbial volatile organic compounds (MVOCs), a clear sign of colonization.

Your primary concern is correct: the visible spot is likely just the tip of the iceberg. Moisture from the leak will have wicked up into the drywall and skirting board, and mold will be spreading within the wall cavity. This is a serious issue that requires immediate and correct action to prevent structural damage and potential health impacts.

For a small, surface-level spot, you can carefully clean the visible area on the skirting board with a solution of detergent and water, but you must first fix the AC leak. However, given the signs of penetration behind the wall, a DIY approach is strongly discouraged. Disturbing the mold without proper containment can aerosolize spores and spread the contamination throughout your apartment.

In the UAE, remediation of hidden mold requires professional assessment. We use tools like borescopes to inspect inside walls and moisture meters to map the extent of the water damage. The remediation process involves setting up containment barriers, using HEPA filtration units (air scrubbers), and safely removing and disposing of contaminated porous materials like drywall and insulation, followed by professional hygienization of the area.

I recommend you stop the leak at its source by having your AC unit serviced immediately. For the mold, contact a professional inspection and remediation company like Saniservice. Our certified experts can assess the full extent of the damage behind the wall and execute a safe, effective remediation plan. Call us at 800-MOLDS (800-66537) or email hello@saniservice.com for a comprehensive inspection.