Gloeocapsa magma is a bacteria that affects many homes in Wisconsin and the Upper Midwest. The best treatment for this condition is by using low pressure in order to preserve the integrity of the roof. Usually you will see the north side of the house with long black streaks covering the shingles but the whole roof can be covered as well.
When this customer called us, they were debating on replacing the roof. Being only roughly 10 years old, we recommended just cleaning the roof instead of replacing. After treatment, the roof looked brand new again and saved the customer thousands of dollars as cleaning is a fraction of the cost of replacement. If your roof has this condition and it is an eyesore, give us a call today at 262-675-4102 and we can get a quote out to you typically the same day.