There are surfaces that can’t handle intense pressure from a pressure washer. This is where soft washing comes in and safely cleans these delicate surfaces.  Soft washing is perfect for all types of siding, delicate stones,  roofs, and new concrete. How soft washing works is, it uses biodegradable soaps and detergents to clean the surface. Pressure washing uses pressure to force stains off the surface. As far as results go, soft washing will always give you a better clean and the cleanliness lasts much longer. Please read this article for a detailed understanding of the difference between Soft Washing and Pressure Washing.