Black shower grout: cleaning company or contractor in Dubai?« Back to Previous Page

Black shower grout returning after bleaching is a classic sign of a deeper mold issue, not just a surface stain. In Dubai's high humidity, especially in an older villa, moisture is likely penetrating the porous grout and getting behind the tiles.

For a persistent problem in Al Barsha, a professional cleaning company is insufficient if moisture is behind the walls. You need a mold inspection to assess the extent. An inspector will use a moisture meter to check the walls and may recommend a lab test to identify the mold type. This diagnosis is critical to determine if you need a remediation specialist to remove affected materials or a contractor to repair the waterproofing and retile.

The cost varies significantly. A simple regrouting job is one price, but if the waterproofing membrane behind the tiles has failed—a common issue in older villas—the repair requires removing the tiles, addressing the membrane, and reinstalling. This is a more involved contractor job. Always request a detailed assessment and quote that outlines the full scope of work, including any necessary waterproofing guarantees.