Mould is a microscopic fungus that breaks down dead organic matter and usually grows in damp and humid places. It’s common to find mould growing on walls, ceilings and around windows, as the fungus feeds on materials like wood, wallpaper and carpet.
There are several types of mould, some more dangerous to human health than others, such as Pathogenic Mould and Toxigenic Mould. As mould grows, it releases reproductive spores, cells, fragments and “volatile organic compounds” into the air – and it is these that can pose a danger to respiratory health.