Experts recommend that the most optimal time for scheduling a house washing service is once every year, but it's important to keep in mind that this number varies on a few factors, such as the climate that you live in, and other natural elements that could affect the status of your home's exterior surfaces. For instance, if you live in an area that is more prone to high humidity and weather events such as hurricanes and other storms, then we recommend scheduling a house washing service more frequently.