Mold is a very tricky organism. It spreads quickly, because living colonies of mold are always releasing "seeds," or mold spores, into the air. The only thing these airborne spores need is a moist, warm organic surface in which to develop. Our attics, basements and crawl spaces provide the perfect environment for them to thrive. Mold-X is applied using a fogger, much like the ones used for pest control. The product will kill and neutralize the mold, stopping it from releasing spores.