There are various types of moulds. Mould in a house generally involves Stachybotrys (black mould), Alternaria, Aspergillus and, Cladosporium. The colour of mould in a house differs, but usually, it is white or black mould. The spores of mould can be created by damp problems in a house, but they can also enter through a window, door, or air grill. The mould usually stays behind on walls and/or ceilings, which produces white or black mould. Dead mould also still contains substances that are harmful to human health. Removing mould as quickly as possible is important.