Soft washing, explained properly.

Every pressure washer has a dial, and most of the industry’s damage comes from turning it up. High pressure cleans by force: it tears the top layer off whatever it hits. On concrete that can work. On siding, roofs, wood, and stucco, the same force etches lines, strips paint, and drives water behind cladding.

Soft washing flips the equation. The pressure stays low — closer to a garden hose than a cutting jet — and the work is done by a soap-based cleaning solution matched to the surface. Brick gets one treatment. Stucco gets another. Painted siding, another still.

We match the chemistry to the surface, and we put it in writing.

The three parts that matter

The mix. Detergents and treatment agents chosen for the material and for what’s growing on it — algae, mildew, and mold each respond differently, and so do the surfaces they’re on.

The dwell. The solution sits and works. This is the step that can’t be rushed: the killing happens during those quiet minutes, not in the rinse.

The rinse and neutralize. Everything comes off at low pressure, and the chemistry gets neutralized afterwards. Plants are pre-soaked and covered before a single drop goes up, and rinsed after.

Soft wash vs pressure wash: which surfaces get which

Always soft washed: roofs, siding and stucco, painted trim, wood, and anything with a coating on it. Pressure on a roof strips shingle granules and cracks tile; on stucco it etches lines and drives water behind the wall; on wood it tears the grain open. These are the surfaces where force removes the evidence and leaves the growth.

Cleaned with pressure, carefully: broom-finish concrete, where an even surface-cleaner pass is the right tool and a hand-held wand is not — that is how driveways end up striped. Stamped and exposed-aggregate concrete go back to chemistry and a low-pressure rinse, because a surface cleaner strips the clear coat off one and washes the stones out of the other.

Neither: solar glass, which gets pure water and a soft brush and nothing else. Each surface’s method is set out on its own page: roof cleaning, house washing, concrete cleaning.

Why the clean lasts.

Because the growth is killed, not sheared. A blasted surface looks clean while the roots regrow; a soft-washed surface is clean down to the root. That’s the difference — and it’s why we document our jobs with before-and-after photos. The results hold up. Soft washing is how we handle house washing and roof cleaning; concrete gets a different method, explained on the concrete page.