Is this severe mold a major, expensive repair?« Back to Previous Page

This is a serious issue requiring professional remediation, not a simple cleanup. The leaking AC has created a chronic moisture source inside your wall cavity, which is why the vinegar wipe failed—it addressed the surface mold but not the root cause or the extensive growth hidden from view.

In Dubai's climate, the constant humidity and condensation from AC systems allow mold to proliferate rapidly behind walls. For a spreading black patch, the repair involves multiple steps: first stopping the AC leak, then accessing the wall cavity to remove contaminated drywall and insulation, HEPA-vacuuming the structure, applying antimicrobial treatments, and finally repairing the building materials. The cost is not in the hundreds; it is a significant project.

You should immediately arrange a professional inspection. A reputable firm will use moisture meters and borescopes to assess the damage within the wall without guesswork. For health safety, especially with a family, proper containment to prevent spores from spreading to other parts of the villa during removal is critical. The final cost is determined by the extent of structural damage, which can only be verified by opening the wall. Request a detailed assessment and scope of work; this is not a DIY situation.