However, the first step is crucial: you must formally notify your landlord or property management company in writing immediately. Document the issue thoroughly with clear photographs and a detailed description. This officially puts the responsibility on them to investigate and rectify the cause. Given the description of the location behind a wardrobe, the primary cause is likely condensation due to the lack of airflow (a condition you’ve identified), which can sometimes become a grey area. The landlord must address the source of the moisture, while you may be expected to maintain adequate ventilation to prevent it.

For a situation like this with visible spreading, a professional inspection is highly recommended to determine the exact species of mold and the full extent of the infestation, which often spreads deeper than what is visible. We can provide a comprehensive assessment, including moisture mapping and air quality testing, to definitively identify the source and create a scope of work for the landlord to execute. This evidence is often necessary to ensure the repair is handled correctly and completely.

For immediate assistance with inspection and testing to resolve this with your landlord, call our experts at 800-MOLDS (800-66537) or email hello@saniservice.com.