How To Remove Algae Stains From Roof Shingles

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.

How to remove algae stains from roof shingles.

It takes special care to clean algae roof stains and moss off the roof. While an occasional cleaning might not harm your roof repeated use of harsh chemicals or the erosive effects of pressure washing can damage or shorten the life of asphalt shingles. If you decide to try it apply it shortly after you ve cleaned the roof. The ugly black red green or brown stains on your roof are likely algae or moss.

Roof shingle algae stains and roof warranties. To clean an asphalt shingle roof to remove black algae stains. The only way to take care of it is to use a high base chemical solution like zinc sulfate. Removing algae stains from roof shingles is easy with the right technique.

Algae resistance provisions of asphalt roof shingle warranties are limited in coverage and scope. It is not uncommon for roof shingles to turn black over time. 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. Whenever it rains trace amounts of metals are washed down the roof inhibiting algae growth.

Here are some major roofing manufacturer s warranty statements. A stain blocking product can buy you up to three years of protection from algae. Getting rid of the problem is important but how do you safely remove algae and moss from roof shingles. When that happens it is generally caused by mildew algae mold or dirt stains.

These black streaks are unsightly and can diminish the appearance of the entire exterior of the home. Also see warranties for roof shingles. Black stains on asphalt shingle roof caused by algae growth. Mix up oxygen based cleaner with water in a five gallon bucket following the instructions.

Whether you install the metallic strips or apply the stain blocking solutions you re still going to experience algae regrowth sometime down the road. To remove and prevent black algae stains on roofs see black stain removal prevention.