Roof Moss Damage & Treatments
Save your roof from the damaging effects off hungry roof moss. Moss can eat half the life out of costly roof shingles and cedar shakes!
Moss is common on rooftops. Moss grows on moist, shaded surfaces and in wet climates. Removing moss from a roof can be complicated and requires taking precautions. Moss' shallow roots system penetrates shingles and promotes rotting. Over time, a shingled roof can become built-up with moss, mildew and gunk. If not cleaned off, these can spread and compromise the appearance as well as the integrity of your roof. Removing moss from a roof requires some patience.
Roof Doctor, Inc. uses two methods for moss control. The first is simply an application bleach water, and the second, used for tougher moss growth, is the application of zinc sulfate. Zinc sulfate is a combination of sulfur and zinc. It is an herbicide typically used for moss control. The toxicity of zinc sulfate depends on the amount of zinc in the product. Zinc is an essential mineral for human, animal, and plant nutrition. Zinc can be found naturally in the environment, foods, and water. How does zinc sulfate work? Zinc binds to proteins or organic acids in plants. In high concentrations, it affects the growth of moss and other plants, and damages the cells causing them to turn yellow. Once the moss completely dies off, it will deteriorate and no longer be present on your roof.
These photos depict examples of moss on composition and wood cedar shake shingled roofs, which will eventually damage the roof's integrity if not remedied.