Soft Washing is completely different from power washing.

Instead of using high pressure, cleaning solutions are added to the water and sprayed at less intense pressures.

These solutions are then rinsed off with a follow-up low pressure spray.  This allows for efficient and powerful cleaning without the destructive force of power washing. The only area of the house that doesn’t require rinsing would be the roof. It is perfectly safe for the solution to sit on the roof shingles until the next rain comes and washes it off.

Soft washing is a great choice for many surfaces, including those that might not stand up well to higher pressure. The chemical additive used in soft washing is great for breaking down biological material like mold, algae, or moss. The lower pressure used keeps other surface materials and even your yard and plants safe. He also points out that painted surfaces and masonry last longer when cleaned with a soft wash compared to a harder spray.