Pressure cleaning
Pressure cleaning Concrete or Asphalt?
Pressure cleaning concrete (2500–3000 PSI) is effective annually, whereas asphalt requires lower pressure (1200–2000 PSI) and higher caution to avoid damage. Use a fan nozzle, never a zero-degree nozzle, and opt for a surface cleaner to avoid stripes. Concrete should cure for a year before cleaning, while older, unsealed asphalt is prone to damage.
Key Considerations
Concrete
Thrives with regular maintenance (yearly) but can be damaged if high pressure (3000+ PSI) is used, causing pitting or cracking.
Asphalt
Requires delicate care; high pressure can gouge, strip, and weaken the surface.
Best Techniques
Use a surface cleaner for an even clean on both materials. Clean in the morning or early afternoon to allow for proper drying.
Preparation
Always sweep debris away and pre-treat heavy stains with a detergent, allowing it to sit for 15 minutes before cleaning.
Safety
Always use a fan-style nozzle, ideally 25 or 40 degrees, to prevent damage from concentrated force.]
The best method for cleaning and maintaining concrete and asphalt are exterior cleaning solutions like K4.
A simple application will kill and remove the growths and keep the surface clean for extended periods.
