As I was getting ready to sell my house, my realtor noticed some oxidation and algae growth on my siding, which is very common in Wisconsin. I looked up some options for removing it and even considered just buying my own pressure washer and doing it myself, but quickly realized I had no idea what I was actually doing. I contacted wash pros and had them come out to give me an estimate. Bill’s knowledge of the specific types of algae, what solutions work best, and how high pressure power washing w