Black mold in shower grout and sealant: DIY or building management?« Back to Previous Page

Black mold under sealant and in grout is common in Dubai's humidity, often caused by persistent moisture from showers and potential hidden leaks. The priority is to stop the water source before cleaning.

For a small, contained area, a thorough DIY approach can work. Scrub grout with a stiff brush and a solution of white vinegar or a dedicated mold-removing cleaner. The critical step is removing all compromised silicone sealant, letting the area dry completely for 24-48 hours, and applying a new, high-quality mold-resistant sealant. An exhaust fan running during and for 30 minutes after showers is essential to manage humidity.

Given the mold was hidden under sealant in an older Bur Dubai building, a slow leak from the shower system or wall is a strong possibility. This is where building management should be involved. They are responsible for the structural integrity of the building and internal plumbing. Document the issue with photos and formally notify them to investigate for leaks in adjacent walls or piping. They should address any construction defects allowing moisture ingress.

If the mold returns quickly after a proper DIY clean or covers more than a few square feet, a professional inspection is wise to identify the exact moisture source and extent. In many cases, a certified inspector can provide a report for building management to substantiate your claim.