Power washing your house every year by Pacific Maintenance Services with a high-pressure water spray can not only keep it looking good but can cut the need to repaint as often. Power washing aluminum, steel, vinyl or wood siding removes grit that grinds away the surface when it's agitated by wind or rain. Power washing is also a good way to prepare a house's surface for repainting, once the siding is clean you may find that you don't need to paint after all. If your house does need repainting, a thorough power washing removes dirt mildew, moss, peeling, flaking and chalking paint. You can wash a large house in a single day.