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

A leaking AC unit causing black splotches and a persistent damp smell is a serious issue, especially in Dubai's climate where high humidity and continuous AC use create ideal conditions for mold. This is not a surface problem you can fix with bleach. The leak has saturated the wall, and the visible mold is likely just the surface manifestation of a larger colony growing inside the cavity.

Bleach is ineffective on porous materials like drywall and concrete, as it only bleaches the surface mold without addressing the root moisture or the hyphae (roots) growing deep within. Disturbing it improperly can also aerosolize spores, worsening your allergy symptoms and contaminating other areas. For a situation involving an active water leak, structural damage, and health symptoms, professional remediation is strongly advised.

The process for a wall cavity infestation typically involves isolating the area, identifying and repairing the AC leak source, removing contaminated porous materials like drywall and insulation, HEPA vacuuming, and antimicrobial treatment. The cost is driven by the extent of demolition required and the size of the affected area, so prices can vary significantly. You should request an on-site assessment from a company that provides detailed scopes of work and, crucially, verification testing to confirm the environment is returned to a normal fungal ecology after remediation.