Powerful results
Concrete, grease and packed-on grime respond to heat and mechanical action rather than to sheer force. Hot water releases what cold water only pushes around, and a rotating surface cleaner works a slab evenly, so the finished driveway has no wand stripes.
Living growth is a different problem. The green film on a shaded wall and the black streaks on a roof are alive and rooted into the surface, so they get a soft wash instead: a solution applied at low pressure that kills the growth, with water used only to rinse. More pressure would not kill it, and on the wrong surface it causes damage.
Eco-friendly
Letting heat and the right equipment do the heavy lifting on concrete keeps cleaning solution for the surfaces that genuinely need it.
Where a solution is used, it goes on at low pressure and only in the amount the surface calls for. Plants under the work area are soaked with plain water beforehand and rinsed again after, so nothing concentrates in the beds. On commercial sites where wash water carries oil, containment is planned before work begins.
Safer surfaces
Pressure washing can significantly reduce slip-and-fall accidents caused by slippery surfaces.
That matters most on the flat surfaces people actually walk on. Algae on a shaded walkway or pool deck is genuinely slick once it is wet, and it builds up slowly enough that nobody notices until someone goes down on it.
For any property
Residential, commercial and industrial jobs all start the same way: work out what each surface is, then match the pressure, the water temperature and the solution to it.
The same equipment and the same judgment about pressure and method apply whether it is a single driveway or a multi-tenant frontage. What changes is scheduling: commercial work is planned around trading hours rather than around the weather alone.