Call to make an appointment at: 888-217-2719. What is the Difference Between Mold Testing and Mold Clearance Testing? Understanding the Importance of Mold Testing and Mold Clearance Testing, for Your Health and Safety. Mold is an issue that many homes and buildings face in environments with high humidity or dampness. It can lead to health problems, including allergies, asthma, respiratory infections, skin rashes and toxic reactions.