Cross contamination occurs when one area infected with mold spreads the mold “contamination” across to other mold free areas, thus making the infection harder to deal with. Cross contamination occurs due to one or more of the following:
- Spreading through direct growth and expansion. As long as the optimal conditions for mold are present, it will continue to rapidly reproduce and expand to other areas of the building. Even an initially small infestation can exponentially grow both inside and outside entire parts of a building.
- Airborne mold spores travelling through HVAC (heating, ventilation, and air conditioning) systems and spreading throughout a building
- Carrying of mold spores through contact with clothing, skin and hair of humans and pets, personal possessions, stored food, and any other physical movement.
- Improper mold removal and remediation can result in previously uncontaminated areas of a building to be exposed to a high concentration of airborne mold, causing just as many mold problems, if not more, than before the procedures took place.