Mold's number-one need is moisture. Indoor mold growth can be prevented if you learn how to control the moisture indoors. If you find traces of mold growth in your home, one of the most important things you can do is to clean it up while looking out for any water problems or air leaks that could be causing this problem.
If you just clean up all traces of mold without doing anything about the water, this could prove to be a fruitless task as the mold problem will just return. What's vital is cleanup and prevention for a happier, healthier home.
Why's it Growing?
Mold grows because it's a part of the natural environment. Mold works by breaking down any dead organic matter like leaves and dead trees. But indoors, mold growth is something that has to be prevented as much as you possibly can. The way mold multiplies is by using spores that float through the air.
While it's perfectly fine and part of the ecosystem, these spores have no place in your home, especially because they can cause respiratory problems if left alone to propagate and are breathed in by humans or pets. Mold begins when spores land on wet surfaces and they grow and multiply.
Stopping Mold Growth
Mold requires darkness, moisture, and warmth to grow. Lose any or all of these and mold won't appear anymore. It gets worse in already completed basements because there are areas behind the drywall that will never see the light of day again and any mold growth present there can go undetected for quite a while.
What you should really watch out for, and what you can control, is the level of moisture; and the moisture that can find its way into your crawl space and basement. Whether it's because of a leaky pipe, faulty water heaters, or high humidity: find a way to make sure it gets dried out immediately. There are various waterproofing solutions available that can aid you, from waterproof sealants to buying a sump pump.