Most homeowners don't realize how quickly dirt and biological growth can accumulate on the outside of their home. If you notice dark streaking on your siding, green or black patches forming near the roofline, or a general dull appearance that won't go away with a garden hose, it is time to call in a professional. In Rhode Island and the surrounding Massachusetts area, the humid climate creates ideal conditions for mold, mildew, and algae growth year round. Scheduling a House Washing once or twice a year can prevent that buildup from causing long term damage to your paint, siding, and trim.