Power washing your driveway or patio can help you make your home's exterior more appealing. Get rid of mold, mildew, and moss. If any area of your driveway or patio is shaded, mold, mildew, and moss will eventually take hold. Power washing the surface gets rid of any growths, so they don't get out of hand. Cleaning concrete periodically will extend its service life and enhance its beauty. It can be difficult to tell when concrete is in need of cleaning because the dirt and grime can build up so slowly. However, once the process is done, the results of freshly cleaned concrete are very noticeable. There are multiple ways to clean concrete depending on the type of surface. Each requires a different procedure to avoid damaging the surfaces.