When is it necessary to get professional help to address a mold problem?

Minor mold problems can often be handled without professional help. For example, most homes have mold growing in the bathroom due to the humid nature of this environment. A minor outbreak of mold in this space can easily be tackled with over-the-counter mold cleaner. However, if mold is growing on drywall or subflooring, or if the contaminated area exceeds 10 square feet, it's a good idea to seek professional help.

If you see mold inside of drywall or on studs, you shouldn't try to tackle the project yourself. Those are tell-tale signs of a major mold problem.

It's generally agreed that if the area of mold is larger than 3 feet by 3 feet, it's time to call a professional. You should only use someone who's accredited with a recognized body like the National Environmental Health Association.