What Causes Stains On Roof Shingles

The algae will worsen and become more noticeable each year trapping moisture and causing premature shingle aging and granule loss.

What causes stains on roof shingles.

They say that while shingle manufacturers offer products treated with copper or zinc to inhibit algae growth their effect wears down over time. But now this black algae is termed a roof shingle algae because of the annoying discoloration on a asphalt shingle roof. Algae stains on roofs. Algae dark stains on asphalt roof shingles the primary species of algae that tends to collect and grow on roofs is called cyanobacteria gloeocapsa magma algae which is contained in and transported through the air.

Light spots on roof shingles dark colored asphalt shingles may appear lighter and patchy as they age. The algae feed on the limestone in shingles. With each passing year the algae will grow and become more and more noticeable. The algae feed off of the limestone within the roof shingles.

Water stains if the discoloration seems to be damp check the attic or ceiling below the roof stain and investigate for a leak. The black roof stains are caused by a form of algae that has been around for years typically found in the woods on the north side of trees or on exposed rocks. Replacing the shingles on your roof just because you have black stains is not necessary however and you should be suspicious of any roofer that suggests roof shingle replacement as the only solution to your algae problem. Causes cures of black brown or green algae staining on roof surfaces.

Reply thomas boni july 13 2020 at 12 18 pm. Roofing manufacturers have tackled the problem of roof algae by creating shingles containing copper which is deadly to algae. Here we discuss the causes of algae growth on roof shingles the effects of these conditions and how to cure or prevent algae formation on roofs. Look in the gutters for signs of asphalt granules that have washed off and expect to need a replacement.

Here is a diagnostic guide to types of stains and staining materials found on roof surfaces black red green brown or other coloured stains on asphalt roof shingles or on other roofing materials need first an accurate diagnosis of the stain cause and then proper steps to remove the stain or to prevent future staining on roof shingles surfaces. Roof experts tell our researchers that though other components are being added to shingles to hinder algae growth they still get calls to deal with black marks on relatively new roofs. Over time this algae accumulates developing a black outer coating which causes stains on roof shingles.