Mould is naturally occurring in our environment.  It breaks down organic materials in our outdoor environment and is integral to the regrowth process.  But, you do not want mould growing in your structure.  Mould is ubiquitous, meaning mould spores are everywhere.  Every time you open a window or door, mould spores will come and go.  For microbial growth to begin within a structure a few things must be occurring.  An undetected leak, a water damage not restored within 72 hours, or a flooding event will provide an environment hospitable for mould to grow.  Along with relative humidity of over 60% and a food source, mould will begin colonising very quickly and growing on all porous surfaces, even growing on dust and debris on a bench.

There are 100’s of different kinds of mould spores, but some of the most common strains found inside structures are aspergillus, chaetomium, penicillium, and stachybotrys, otherwise know as black mould.