Soft washing is a safe, effective, and smart alternative to pressure washing for your home or business. It uses water-based, biodegradable chemicals that emulsify dirt and grime, as well as eliminates mold, mildew, algae and bacteria — sanitizing and disinfecting the surface. Pressure washing can be destructive and can damage the surface you are trying to treat. It can even void your roofing warranty if done incorrectly.