How to treat and prevent mold behind damp bedroom wall?« Back to Previous Page

That damp interior wall suggests a hidden moisture source, likely a small plumbing leak from an adjacent bathroom or condensation from an AC duct running inside the wall cavity. The black spots are likely Stachybotrys or Cladosporium, which can irritate respiratory systems and cause the coughing you're noticing.

For treatment, first address the moisture source. Check for leaks from pipes in the adjoining bathroom and inspect any AC ducts for condensation. Until the leak is fixed, any cleaning is temporary. To clean, wear an N95 mask and gloves. Mix a solution of one part white vinegar to four parts water or a dedicated mold-cleaning detergent. Scrub the affected area thoroughly. Avoid bleach, as it only surface cleans and doesn't kill the roots.

After cleaning, let the wall dry completely. A dehumidifier or fan can help. Then, apply a mold-resistant primer before repainting to help prevent regrowth.

To stop it from returning, you must control the humidity. In Dubai's climate, this is critical. Ensure your AC is running efficiently and that your room's humidity level stays below 60%. Improve air circulation in the room by not pushing furniture directly against walls and using a ceiling fan. For a permanent solution, the wall cavity may need to be inspected for insulation issues.

Given the symptoms your children are experiencing and the wall's dampness, this is beyond a simple surface clean. A professional inspection is strongly recommended to identify the exact moisture source and assess potential spread within the wall. They can use moisture meters and borescopes to see inside the cavity and provide a targeted remediation plan.