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Pressure Washing Stucco

by | Apr 10, 2020 | Blog | 0 comments

The preparation starts with a thorough washing to remove all dirt and dust. Pressure washing can be a delicate operation. Stucco is a relatively soft masonry coating and can be easily damaged by high-pressure water. Use minimal pressure, 1200-1500 psi and a wide spray tip.

Masonry cleaners and soaps can be used for heavily soiled areas, efflorescence deposits or rust stains. Usually the use of cleaners is not essential.

Begin washing at the top of the wall and work your way down. Keep the spray tip 12-inches or more away from the surface. Pay special attention to windows and doors. Angle the pressurized water away from these areas to prevent leaks or water intrusion behind the stucco.

The pressure washer can remove loose paint, but it can also remove some of the stucco if the pressure is too high or the tip is to close. Use the washer to provide a clean surface. Don’t rely on it to remove all the loose paint.

Allow the stucco to thoroughly dry before proceeding with priming and caulking. This can take 24 hours or more depending on temperatures and humidity.


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