Urgent to treat shower mold behind tiles or DIY?« Back to Previous Page

Moisture behind tiles is a serious concern in Dubai's climate, as high humidity and constant AC use create ideal conditions for mold to thrive inside walls. If you see mold on the sealant and detect a persistent musty smell, it is very likely there is more extensive growth behind the tiles that you cannot see.

For a DIY approach this weekend, you can address the surface mold on the sealant. Wear an N95 mask and gloves. Scrub the affected silicone with a dedicated mold remover or a solution of white vinegar or diluted bleach. Rinse thoroughly and let the area dry completely. However, this is only a temporary solution if the moisture source—likely within the wall—is not identified and resolved. The mold will almost certainly return.

Given your description of a musty smell and visible growth under the sealant, a professional inspection is strongly recommended. The urgency is high because hidden mold can compromise structural elements like drywall and pose health risks, particularly in enclosed spaces like bathrooms. A certified inspector can use moisture meters and borescopes to assess the extent of the problem behind the tiles without causing unnecessary damage. They can determine if the issue is due to a pipe leak, condensation, or failed grout and advise on the necessary remediation, which may involve removing tiles to properly dry and treat the cavity. For verification, always request documented evidence of the moisture readings and any post-remediation testing from an accredited lab.