How to remove and prevent black mold with high humidity?« Back to Previous Page

Black mold behind furniture is common here due to our high humidity and condensation from AC units. The dampness you feel indicates a moisture issue that must be addressed first.

For a small patch (under one square meter), you can clean it yourself. Wear an N95 mask, gloves, and eye protection. Scrub the area with a mixture of detergent and water, then disinfect with a solution of one part white vinegar to four parts water. Do not use bleach, as it only removes the surface color and does not address the root moisture problem.

However, since the wall is damp and this is near a living area with children experiencing coughing, the most effective approach is to identify the moisture source. This is often condensation from an AC supply duct running inside the wall or a small, hidden plumbing leak. Simply cleaning the visible mold will not stop it from returning if the wall remains wet.

Prevention requires controlling humidity. Ensure your AC is correctly sized and running consistently to manage indoor moisture levels. Use exhaust fans in kitchens and bathrooms, and consider a dedicated dehumidifier if humidity persists above 60%. Improving air circulation by keeping furniture slightly away from walls can also help.

For a situation with persistent dampness and health symptoms, a professional inspection is recommended to locate the exact moisture source. They can use moisture meters and thermal imaging to find hidden problems behind the wall that DIY methods can't detect.