The frequency at which a professional should inspect for mold depends on several factors. For instance, if the home has experienced water damage, it is recommended that an inspection be conducted more frequently than in other homes with no water damage. Additionally, if there are any visible signs of mold growth, such as discoloration on walls and ceilings, it is recommended to have an inspection done immediately. Furthermore, if anyone living in the house experiences allergy symptoms like sneezing, coughing, and hives when indoors, this may indicate the presence of mold and warrants an immediate inspection by a professional.