This photo is a prime example of what can happen when mold is left untreated and given the opportunity to expand. In this house particularly, mold was fond in the basement boiler room and left untreated, which turned out to be detrimental to the house. It quickly spread to the entire home, infiltrating all the way up to the attic. It took this home a full mold remediation in order for things to go back to normal. In addition to causing a ton of damage to your home, untreated mold can also have negative health effects as well and should be handled as soon as possible.