Meeting planner for Washington, District of Columbia and Mexico City, Mexico. To schedule a conference call or plan a meeting at the best time for both parties, you should try between 10:00 AM and 5:00 PM your time in Washington, DC. That will end up being between 9:00 AM and 4:00 PM in Mexico City, Mexico.
Power Washing. When used properly, power washing can keep your paving in top condition. But if used incorrectly, it can ruin the paving especially high pressure water jet by removing the jointing material and disturb the blocks bed surface.Firstly sweep the area with a stiff brush to remove any loose material on the surface.asic Cleaning. photo courtesy of pavingexpert.com. The simplest and safest way to clean paving is to scrub it with soapy water. Do not use acid or acid based cleaners. Using a stiff brush, with rough, thick bristles, scrub to loosen any surface detritus. Wash off any loosened dirt with clean water.
A: Roger Cook replies: Power washing is usually enough to remove moss (probably your green stains) as well as mildew stains (usually black) from brick and other patio surfaces. You'll get better results when the moss is actively growing, but you should be able to remove the stains even in cold weather.