Humidity causes mould to grow. Limited airflow and moisture create a microclimate for mould to develop. In some cases, mould will begin growing on furniture, clothing and other contents within the home.
In instances when this occurs, it is not an inherent fault of the furniture, clothing and other contents; rather, humidity or dampness in the air can supply enough moisture for mould growth on any surface. Mould can occur anywhere, and humid climates provide the optimal conditions for the fungi to grow and thrive on any surface.