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Repaired stucco requires regular inspections, cleaning to prevent mold or mildew build-up, and timely minor repairs to address hairline cracks. Applying protective sealants can also enhance longevity and maintain its appearance.

Stucco is very challenging to DIY, so it’s always best to leave the work to professional stucco contractors. The same recommendation applies to painting a stucco house, which should be left in the reliable hands of a professional exterior painter. Inexperienced DIYers can make several critical mistakes during stucco application, such as:

• Failing to apply sufficiently thick layers for longevity and water resistance

• Uneven application

• Uneven texture across the exterior

• Mixing the stucco improperly, leaving a weak structure

• Failing to texture properly in between coats, leading to cracking and chipping

The best tape that works on stucco is the kind made explicitly for stucco surfaces. Look for tape that specifies stucco, masonry, or cement installations. The adhesive usually needs to be thicker and more durable to remain stuck to these rough surfaces.

When cleaning stucco siding, it is recommended to use a pressure washer with a psi (pounds per square inch) between 1,500 and 2,000. This range provides sufficient power to remove dirt and grime without causing damage to the stucco surface. It's important to avoid using excessive psi as it can chip or crack the stucco. 

Using a wider spray nozzle and keeping a safe distance of about seven to 10 feet from the siding helps ensure a gentle and effective cleaning process. Always follow the manufacturer's guidelines and adjust the psi accordingly based on the condition of your stucco and the specific requirements of your pressure washer.