First, let's go over a quick primer on what mold is. All molds are fungi, and share biology with mushrooms and lichens, for example. The mold that is toxic to humans is uncommon in the fungus world, 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 cleaned up and completely removed.

Government experts recommend that you call a commercial mold removal Fairfax VA company for cleanup help if the smelly mold takes up more than about 3 square feet. If you see mold growth, there is probably hidden mold trapped in drywall and crevices and elsewhere.

Before you select any company, check that they are certified properly and that they are approved by watchdogs such as the Contractor Connection, Restoration Industry Association and the Institute of Inspection, Cleaning and Restoration.

You need to clean up any mold you find to stop further harm, and do it right away. If not, harmful mold will keep eating on your home or business and can destroy your possessions.