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Here is a recent tile roof we cleaned in North Tampa. This roof was cleaned using a small amount (1/4 cup per gallon) of TSP. This tile roof cleaning picture was taken right after the cleaning. It looks even better now that we have had a few rains since we cleaned this tile roof. We have always said "No one can rinse a roof like God can", and that is the truth. All roofs we clean, tile or shingle, always look their very best after a few good rains. Here in Tampa, it rains nearly everyday, in the summer. We have a subtropical climate in Tampa, with a summer rainy season. The past 2 winters here in Tampa, we have had a lot of rain. This has caused roofs here in Tampa Florida to become especially dirty, as the rain feeds the roof algae growth.