Abstract: A method for remediation of mold in a building comprising the steps of investigating the building to determine a presence of unwanted mold, sampling said unwanted mold both inside and outside of said building to determine a species of said mold and an indoor to outdoor ratio of mold spores for said species, a spore concentration for said species, and a number of colony forming units for said species, diffusing essential oils into the building for a predetermined period of time, where said predetermined period of time is based on a determination of three measures of said species, ratio of indoor to outdoor mold spores, spore concentration, and number of colony forming units; and directly applying a household cleaner with essential oils to any mold-affected areas. Removal and preventative steps prevent the recurrence of the mold infestation.