Very dirty roof and house sidings covered in algae. With our soft washing process we are able to clean soft surfaces without damage them. We started this project lightly brushing the roof to get rid of the big chunks of moss. After that, we blown down the entire roof and cleaned up the gutters. When the whole process was done, we sprayed the entire roof with our roof cleaning solution to kill any algae, moss or black streaks on the roof. The black streaks disappeared right the way. The moss is already dead but will take up to 6 weeks to disappear completely. After roof was done, we soft washed the sidings of the house with a low pressure equipment. Nice results.