How to permanently stop mold in my kids' bedroom?« Back to Previous Page

The mold returning after bleaching indicates a persistent moisture source, likely condensation from the AC or a small leak in the wall. Bleach only removes surface discoloration but doesn't address the root cause or the hyphae (roots) growing inside the porous material.

In Dubai's climate, outer walls in older villas are prone to thermal bridging, where the heat outside meets the cooled interior, creating constant condensation—a perfect environment for mold. Your AC unit might also be set too cold, exacerbating the temperature difference.

First, reduce indoor humidity. Run exhaust fans during baths/showers, ensure your AC drain line is clear and the unit is properly sized for the room. A dehumidifier can help, but it's a secondary measure. Next, inspect the wall for cracks or leaks from outside; sealing any penetrations is crucial. For the visible mold, use a dedicated mold cleaner (not bleach) containing quaternary ammonium compounds, which are more effective at inhibiting regrowth.

For a permanent solution, the wall's surface temperature needs to be raised. This can be done by improving insulation or adding a thermal barrier paint. However, the most effective step is a professional inspection. They use thermal imaging cameras to pinpoint the exact location and severity of the moisture intrusion and hygrometers to measure humidity levels inside the wall cavity. This identifies if the issue is condensation, a pipe leak, or even rising damp. Based on their findings, they can recommend targeted remediation, such as injecting drying agents or re-rendering the affected section, to stop it for good. Given the recurring nature and your children's symptoms, an assessment is strongly advised.