 and they are different from each other. Mold is generally a darker shade and has a fuzzy texture. Mildew starts out white, eventually turns brown, and is flat. Either way, you don't want them in your home. The best way to prevent mold and mildew from making your house, and you, sick, is to control moisture levels. Maintain a humidity level of 50 to 60 percent. Fix leaky faucets. Repair holes and cracks in the roof and walls. And replace carpeting or furniture that's been wet or not quickly and fully dried.