Soft washing is the use of a combination of biodegradable chemicals and a low-pressure, non-abrasive water jet to kill harmful and unsightly algae, mold, and lichen, while cleaning off hard to remove dirt and discoloration. The low pressure water jet is unofficially described as any jet that you could safely put your hand in front of, whereas the high pressure jet will cause laceration and damage to uncovered skin.

High pressure power washing can cause permanent damage to all surfaces commonly found on and around your home. Not only can a high pressure jet damage and discolor vinyl siding, it can also shoot water underneath the siding, causing leaking and unseen damage.With wood, a high pressure jet can strip finishes, etch the soft pulp of the wood, and damage the lignin that holds the pulp together, and gives the boards their structural integrity. The high pressure jet can permanently discolor concrete, stone, and brick, and it can loosen and erode the mortar between bricks and stone.
 

While power washing certainly has its place in property improvement, there are many reasons that you may want to consider soft washing for your next home or business exterior, driveway or parking lot, walkway, or patio cleaning, and restoration. For both first time cleans and routine maintenance, soft washing has two significant advantages over power washing:

• Soft wash is less likely to damage siding and wood, or leave permanent marks on concrete, brick and stone. 
• Soft wash kills algae, mold, and mildew instead of just blasting it off, keeping the surface clean and clear of discoloration longer.