Like with so many other areas of our lives the cleaning industry has gone through its own evolution. Years ago pressure washing became a popular method of cleaning dirt, mold, etc. from different building surfaces. This method relied on pure pressure to clean and lift the dirt and mold from the siding. Then heat was introduced to the water, which helped to kill the mold and increase efficiency. However, this method still required pressure to do the cleaning. Pressure tended to cause a lot of damage to the different surfaces, especially surfaces such as stucco, wood, paint and Dryvit. It even took its toll on vinyl siding, causing potential cracking or brittleness. Over time different chemicals were added to the water to see if they would increase the effectiveness of the cleaning process.
Then softwashing came into play. Pressure was no longer needed to clean the surfaces. The proper blend of cleaning agents were added to the water, applied to the surfaces, allowed to work, and then rinsed off. The cleaning aids are also more effective at killing the mold and mildew.