Most roof stains are caused by the growth of algae, lichen colonies or moss that feed on organic matter frequently found on roof surfaces. The portions of a roof that receive the least amount of sunlight are more likely to have roof stains. This explains why some homes may have roof stains only on one side of the roof, typically the northern and/or western exposure or in heavily shaded areas.

The ugly black streaks on your roof are ALGAE. It’s growing and spreading across your roof surfaces and eating away at your shingles. If it is not removed, you could be replacing your roof a lot sooner than you would like.

roof stains algae Algae growing on roof surface

Roof Shampoo® is the GREEN, eco-friendly roof cleaning method to clean dirty roof stains from asphalt and fiberglass shingles.

When Roof Shampoo® technicians leave your house, your algae stained roof will be STAIN FREE. Guaranteed! No waiting, no wondering, and no worrying if the stains will really go away. You will be able to see for yourself.

By hiring an authorized Roof Shampoo® contractor, you know you are getting a true professional and NOT a ‘splash and dash’ roof cleaner or one who is improperly trained, has the wrong tools, uses damaging high pressure, scrubbing techniques, or harsh, toxic chemicals such as chlorine bleach and TSP. These techniques spell disaster and can do irreparable damage to your roof and landscaping. They can remove the top layer of important roof silica that provides the roof with ultraviolet protection and longevity.roof stains van cleaner

Once these important granules are removed by improper roof cleaning techniques, they can no longer protect or bind your roofing together.

Over time, this can lead to roof leaks! Save your roof AND your landscaping, call the Andy’s Roof Shampoo® to clean those dirty roof stains and keep the stains off for life with our annual roof stain preventative treatment program.