Stop roof algae from coming back.
How to remove algae from roof tiles.
The most common class of roof algae is gloeocapsa magma a bacterium that eats water and expels oxygen.
When it rains a slight amount of zinc dissolves from the strips and coats the roof inhibiting algae and fungus growth.
There are several products on the market specifically designed to remove algae stains from roofs such as wet forget outdoor.
To keep the algae from coming back insert 6 inch wide strips of zinc or copper under the row of shingling closest to the roof peak leaving an inch or two of the lower edge exposed to the weather.
You may think you have roof algae when really you have moss mildew or mold.
Algae grow most often on wood and asphalt shingles or concrete tiles especially if they do not get a lot of sunlight.
People who live in all parts of the nation and have roofs made from all sorts of materials wood metal asphalt clay or concrete tiles etc.
Although they can be found on virtually any outdoor surface.
Often algae that is identified as green when studied microscopically also looks black or quite dark on a roof surface.
Algae growth is common on roof surfaces of several materials including asphalt shingles concrete and clay roof tiles and even slate.
That way whenever it rains some of the metal molecules will wash down the roof and kill any algae trying to.
Lichen is a combination of algae and fungus.
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.
Can have moss and algae accumulate on their roofs.
Zinc strips left have been used for many years as an algae preventative.
How to remove lichen from roof tiles and outdoor surfaces.
Those places that receive more rainfall and have sustained high levels of humidity have more moss and algae growth as the moss and algae need water to grow and multiply.
Roofs pavers rock walls gravestones and sidewalks are popular areas where lichen can be found.