At one time I owned a commercial pressure washing company in Tampa, so I know from firsthand experience how a properly applied pressure washing job can dramatically change the appearance of any building, asphalt shingle and tile roof, and flat surfaces, such as concrete sidewalks and driveway. The two keys to a great-looking pressure-washing job are state-of-the-art equipment and properly formulated cleaning chemicals. A professional pressure washer will have the right pieces of equipment to clean all types of washable surfaces and will use chemicals specially formulated to remove soot, scum, mold, grease, grime, mildew, and rust from all types of washable surfaces. And believe me, a pressure washing machine with an 18 horsepower engine, operating at 3,500 pounds per square inch of pressure (PSI), with a water flow rate of 3.5 gallons per minute (GPM), is capable of cleaning any washable surface to the point where it looks brand, spanking new. For example, I have been able to pressure wash stucco and concrete block walls coated with layers of grime, soot, mold, and mildew that had accumulated over the years and make them look like they were just built. And I have also been able to clean asphalt shingle and tile roofs that were filthy from mold and mildew and make them look like new, without damaging any shingles or tiles. I have had the same results cleaning concrete surfaces, too. Trust me, after you have had a building cleaned by a professional pressure washing service, you will be absolutely amazed at the dramatic difference it makes to the building's appearance!
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