One of the most satisfying, but time-consuming, outdoor tasks you can take on is power washing your driveway and walkways. While you know that using a power washer can almost magically erase built-up dirt, debris and stains from practically any surface, you might wonder: Can power washing damage concrete?
The quick answer is yes, power washing can degrade a concrete surface.
You can notice visible damage from water pressure at the level at which even light-duty power washers can operate. Therefore, if you aren’t careful, you can cause irreversible damage to your driveway or patio. Also, some concrete is weaker than others, making some areas more vulnerable to developing lines, pitting or other surface imperfections, not to mention the deterioration to joints if mortar or joint sand is washed away during the process.
The top reasons for pressure washing damage are using the wrong nozzle, excessive pressure, spraying too close to a concrete … Read Full Post »