In your Al Barsha villa, the damp storage room and visible growth indicate a persistent moisture issue, which bleach scrubbing will only address superficially. The mold’s root cause—likely water seepage through the wall or slab—needs to be identified to prevent regrowth. Dubai’s high humidity and year-round AC use can cause condensation that fuels hidden mold inside walls and under floors, far beyond the visible patch.

Given the child’s allergies, a professional inspection is prudent. Inspectors use tools like thermal cameras and moisture meters to find hidden dampness, and air sampling can identify spore types and concentrations to gauge health risks. Reputable providers in the UAE should be able to explain their methodology and provide a detailed report with findings and remediation guidelines, not just a quote for work. Request this documentation upfront.