Скачать или смотреть Placida Roof Job Bergman Roof Cleaning 33981 Soft Wash

There are 2 ways to clean roofs - power washing and soft washing. Many roofing manufacturers specify the soft wash method, so they don't have to replace roofs prematurely, due to wear and tear from pressure washing equipment use and workers having to walk on basically every square foot of your roofing!. With soft washing very little, if any of your roof will be walked on. Some MFG say pressure washing a roof can void the warranty. Presuure cleaning is done by walking on your entire roof and blasting the appearance of living black algae off with a 3000 to 4000 psi power washer and of course, in turn, blowing that living algae onto everything surrounding your house.

It also leaves living invisible black algae spores coating your entire roof, which will continue growing and will be visibly black again in 1 to 1 1/2 years.

Read from them here-

bergmanpressurewashing.com/Manufacturer_specifics
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