First, let's go over a quick primer on mold. Every kind of mold is a fungus, just like mushrooms and lichens, for example. The mold that is toxic to people is relatively uncommon in the fungi kingdom, meaning most kinds you find in your house or business aren't harmful. However, some are dangerous, so any mold in your home or business must be mitigated and completely removed.

That means calling a mold damage repair company is best. This is because if you see mold growth, there is probably more behind walls, in attics and elsewhere.

Before you choose any company, check that they are licensed and registered properly and that they are certified by groups such as the Restoration Industry Association, the Institute of Inspection, Cleaning and Restoration and Contractor Connection.

Mold left to grow sends off spores, which fly like dandelion seeds and can harm your possessions in short order. If not, mold growths will continue to feast on your structure and can ruin your possessions.