How To Remove Algae Stains From Roof Shingles

Black stains on asphalt shingle roof caused by algae growth.

How to remove algae stains from roof shingles.

Remove black stains from roof shingles to preserve the appearance of your home s roof. If you decide to try it apply it shortly after you ve cleaned the roof. Whether you install the metallic strips or apply the stain blocking solutions you re still going to experience algae regrowth sometime down the road. Removing algae stains from roof shingles is easy with the right technique.

Algae stains don t show up below the metal flashing around chimneys or roof vents because the copper and the zinc coating on galvanized sheet metal are toxic to algae. Algae stains can be removed by cleaning though they usually return. A stain blocking product can buy you up to three years of protection from algae. It takes special care to clean algae roof stains and moss off the roof.

The ugly black red green or brown stains on your roof are likely algae or moss. How to remove algae from roof shingles here in oregon mostly blue green algae grows on the outside of the house or on the roof shingles. Here are some major roofing manufacturer s warranty statements. Roof shingle algae stains and roof warranties.

When that happens it is generally caused by mildew algae mold or dirt stains. Also see warranties for roof shingles. To remove and prevent black algae stains on roofs see black stain removal prevention. Getting rid of the problem is important but how do you safely remove algae and moss from roof shingles.

To clean an asphalt shingle roof to remove black algae stains. Mix up oxygen based cleaner with water in a five gallon bucket following the instructions. The only way to take care of it is to use a high base chemical solution like zinc sulfate. It is not uncommon for roof shingles to turn black over time.

Whenever it rains trace amounts of metals are washed down the roof inhibiting algae growth. The organisms use your roof shingles as food which slowly deteriorates the materials.