These get used interchangeably, and they shouldn't be. They're different methods, suited to different surfaces, and using the wrong one causes real damage.
Pressure Washing
Pressure washing uses water at high force to physically blast dirt off a surface. It works because of mechanical energy — the water does the work.
That's the right approach for hard, durable surfaces: concrete driveways, sidewalks, paver patios, block walls. These can take the force, and it's efficient at lifting ground-in dirt and surface staining.
Soft Washing
Soft washing uses low pressure — closer to a garden hose — combined with a cleaning solution that does the actual work chemically. It's applied, given time to break down organic growth, then rinsed.
The distinction that matters: soft washing kills algae, mold, and lichen at the root. Pressure washing knocks growth off the surface, but anything left behind regrows. That's why a soft-washed roof stays clean substantially longer than one that's been blasted.
Soft washing is correct for roofs, painted stucco, screen enclosures, vinyl and aluminum fencing, and anything with a finish that can be stripped or a material that can be forced apart.
What Goes Wrong With the Wrong Method
High pressure on a tile roof cracks tile and strips the protective glaze. On shingles, it lifts granules — the layer doing the actual protecting. On painted stucco, it strips paint and can force water behind the surface, where it stays. On screen enclosures, it stretches or tears the mesh. On pavers, it blows joint sand out from between the stones, which then need re-sanding.
None of that is hypothetical. It's the common thread in most exterior cleaning damage.
How to Tell What You Need
The rough rule: if it's a hard, flat, durable surface underfoot, pressure washing is likely appropriate. If it's overhead, painted, coated, or fabric, it should be soft-washed.
Some jobs are both. A house wash might soft-wash the stucco and pressure wash the driveway in the same visit — different equipment settings on different parts of the same property.
Every surface on a property has a right method. We'll tell you which one yours needs. Request a free estimate or call us at (561) 907-1333.