Mold in bathroom: DIY or professional remediation in Dubai?« Back to Previous Page

Black spots in grout that return after bleaching indicate active mould growth, not just surface staining. In Dubai's high humidity, especially in bathrooms with year-round AC use creating condensation, this is a common issue. The mould's root system is likely deep within the porous grout and potentially behind the tiles.

For a small, isolated area, a concentrated hydrogen peroxide-based cleaner (available at ACE) can be more effective than bleach at penetrating porous materials. However, if it's spreading to the ceiling, this strongly suggests a persistent moisture issue and possible hidden growth within wall cavities. Scrubbing surface mould can release a large number of spores, causing it to spread further.

A professional inspection is recommended in this case. They use moisture meters and borescopes to assess conditions behind walls without unnecessary demolition. Remediation cost is not fixed; it depends entirely on the extent of the hidden damage. The price is driven by how much material is affected and the required containment procedures to prevent cross-contamination. For a standard bathroom, you can expect a significant range; the only way to get an accurate assessment is to request an on-site evaluation from a company that provides detailed scopes of work.