Most residential homes benefit from being professionally power washed or soft washed once every one to two years to prevent the accumulation of mold, mildew, algae, dirt, and pollutant grime. However, the ideal frequency depends heavily on your local climate, surrounding environment, and regional humidity. Homes situated in heavily wooded areas with dense shade, high humidity, or near coastal saltwater environments often require annual exterior cleaning, whereas homes in dry, arid climates can comfortably go every two to three years.
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