First, let's go over a quick primer on what mold is. Every kind of mold is a fungus, and share biology with mushrooms and athlete's foot, for example. The mold that is dangerous to people is relatively uncommon in the fungi world, meaning most kinds aren't harmful. However, some toxic molds are dangerous, so any mold you find indoors must be mitigated and completely removed.

That means contacting a mold damage repair company is almost always a good idea. If you see mold growth, there is probably more trapped in drywall and crevices and elsewhere.

Before you hire any company, check that they are certified properly and that they are approved by groups such as the Contractor Connection, Restoration Industry Association and the Institute of Inspection, Cleaning and Restoration. You might also make sure the company knows and follows federal mold cleanup recommendations whether your mold is in a business or a residence.

You need to clean up any mold growth you find to stop further mold damage, and do it right away. If you don't, parasitic fungi will keep eating on your home or business and can destroy your possessions.