Should I handle this black mold myself or call a pro?« Back to Previous Page

A small patch you just noticed is often manageable yourself, but the location and rapid onset in this humidity are red flags. Black mould on an exterior wall suggests a condensation or water intrusion issue, which a bleach wipe won't fix. The persistent musty smell confirms active growth.

For a patch smaller than one square meter, you can attempt cleaning. Do not use bleach; it is mostly water and can feed the mould deeper into porous surfaces like drywall. Use a dedicated mould remover or a solution of white vinegar and water. Scrub the area, let it dry completely, and monitor it. However, given the wall is exterior-facing, the root cause is likely a thermal bridge causing condensation or a tiny leak, both common in Dubai's climate where ACs run constantly against extreme outdoor heat.

If the mould returns within a week, the smell persists after cleaning, or you discover the patch is larger than initially visible (often the case behind baseboards), you need a professional inspection. They will use a moisture meter to find the hidden water source and recommend remediation. Addressing the underlying moisture is the only permanent solution. For health concerns, especially with a strong smell, a lab test can identify the species and inform the best cleanup approach.