Corss contamination occures when one mold infested area spreads mold to a previously mold free or uncontaminated area.

Mold cross contamination is usually made possible by one or more of the following methods:

1. Airborne mold spores are extremely light in weight and thus easily carried througout a home, office or any  other type of building by HVAC (heating, ventilating and air conditioning), air movement, fans, mold laden  breezes coming into windows and doors and ordinary room and house air flows.

2. Mold spread by direct colony growth and expansion.  if mold spores or existing mold colony infestation have a  water source such as high humidity, a roof leak or a slow water leak inside a wall, ceiling or floor, the mold  infestation can spread rapidly from the origin to adjacent, ever-expanding areas – such as growing and  expanding throughout and INSIDE OR OUTSIDE entire walls, ceilings and floors.  A small mold occupation, if  supplied by adequate exposure, can infect and occupy huge areas in just a week!

3.  Transportation of mold spores or mold colony growth by being carried by clothing, skin and hair of humans  and pets, personal possessions, stored food and any other physical movement that can carry mold spres or  mold growth to new locations.   It is very common that familes who leave a mold polluted residence can  cross contaminate their new location by moving their mold laden clothing, pets and personal possessions,  such as upholstered furniture there.

4. Improperly done mold removal and remediation procedures can expose previously uncontaminated areas of  a home or building ot airborne mold levels that are thousands of times greater than the previous mold levels  in the formerly uncontaminated areas.



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