If you want longer lasting concrete bases around the house, then cleaning them will give them a longer lasting finish. Concrete becomes filled with dirt, mold, algae, plant stains, tire marks, oil and liquids, and irrigation rust. Also by removing years of stains and baked-in dirt, power washing refreshes your house's look and turns years back on the clock to help your home look brand new. No matter the surface, power washing your home is the best way to get rid of mold, mildew and stains on your home's siding, driveway, deck, and fencing.