I am new to the house washing . I have to do a small building for a customer. I have not been around to look for the higher % sh but if I buy a gallon of 5% store bleach and mix it with a gallon of water it will put me at a 2.5% mixture correct. Or am I missing something? How much say dawn should I add to a 2 gallon mixture?. This building is vinyl and has black and green mold.
thanks
thanks