Basements tend to be damp thus encouraging mould growth. Some of the common moulds in basements include Aspergillus versicolor, Penicillium spp, Aspergillus fumigatus and Fusarium spp. However, the types of moulds present in a basement would depend on how damp the basement is. For example, under extremely damp conditions the dominating moulds would be those that require high levels of moisture for growth such as Ulocladium, Stachybotrys, Fusarium, and Aspergillus fumigatus. Under relatively dry conditions, the dominating types of moulds would be those that can grow at low moisture levels such as Aspergillus versicolor, Penicillium chrysogenum, Eurotium species and Wallemia sebi.

Are These Moulds Dangerous?
Allergenic and toxic hazards of common indoor moulds are dependent on the quantity of mould present and the health status of individual person. However, regardless of the amount of mould present or the health status of occupants, mould should never be allowed to grow indoors.