All in all hiring a professional like perfect power wash to remove algae from your roof is an easy decision.
Power washing roof algae.
A mixture of trisodium phosphate tsp bleach and water will also remove stains.
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.
Pressure washing in which highly pressurized water is sprayed on the roof to remove any mold algae dirt or grime and chemical cleaning sometimes called soft washing in which chemicals are the main thing that are removing those harmful things from your roof.
Instead spray down the roof with a cleaner that kills mold and moss or apply a 50 50 mixture of bleach and water in a pump sprayer and let the moss die on its own.
That way whenever it rains some of the metal molecules will wash down the roof and kill any algae trying to regain a foothold on your shingles.
It will save you time money and ensure your roof is being treated safely and effectively.
Our roof treatment utilizes a low pressure soft wash with biodegradable cleansers to safely and effectively restore the look of your roof.
Make sure to build up pressure.
After power washing the concrete algae will have a harder time returning than if you simply used a broom and a little soapy water.