A home mold test kit should be seen as just the first step in detecting possible mold. Always follow up with a professional contractor who specializes in testing for and locating sources of mold contamination. All buildings contain mold, mildew, pollen, and dust; however, if mold is getting a strong foothold due to a problem such as a roof leak, more thorough testing will help determine that source, so you can fix the problem and restore a balance.