Black mold in shower: call maintenance or specialist?« Back to Previous Page

Start with building maintenance. In a Marina apartment, they are responsible for the building's structure, including the ceiling. The issue is likely due to condensation from the high humidity and inadequate ventilation, which is extremely common here. They should inspect for any potential leaks from the apartment above and assess the ventilation system.

For a small, surface-level patch, maintenance can often handle the cleaning. However, if the area is larger than one square meter, has a persistent musty odor, or returns after their cleaning, you should call a specialist. A professional mold inspection can determine if the mold has penetrated the ceiling board or is growing within the cavity, which requires proper containment and removal to prevent spores from spreading.

Before any cleaning, ensure the area is dry. For a temporary DIY approach on a small patch, a solution of white vinegar or a diluted bleach mixture (ensure good ventilation) can be applied. However, this only addresses the visible growth, not the underlying moisture issue. The core solution is improving airflow; run the bathroom exhaust fan for at least 30 minutes after showering and consider a dehumidifier.

A specialist with a microbiology lab can provide a post-remediation verification test, which is the only way to confirm the space is truly clear of elevated spore counts. For renters, always report the issue to your landlord or property manager in writing to ensure the responsibility for a proper fix is documented.