What is the difference between soft washing and pressure washing?

Pressure washing uses high-pressure water (2,000-4,000 PSI) to blast dirt off hard surfaces like concrete. Soft washing uses low pressure (under 500 PSI) combined with cleaning chemicals to kill mold, algae and mildew at the root - safe for roofs and painted siding.

Is soft washing more expensive than pressure washing?

Yes, slightly - typically 10-30% more per job, because chemicals cost money and soft washing takes more technique. A roof soft wash usually runs $350-$700 versus $180-$300 for a concrete driveway.

Can pressure washing damage my roof or siding?

Yes. High pressure on asphalt shingles strips the granules and shortens roof life; on vinyl siding it forces water behind the panels. Soft washing is the recommended method for both.

SudsQuote › Guides › Soft wash vs pressure wash

Soft Washing vs Pressure Washing

Both methods clean - but they clean different things in different ways. Using the wrong one can damage a $15,000 roof. Here is when to use each, and what it costs.

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What each method actually is

	Pressure washing	Soft washing
Pressure	2,000 - 4,000 PSI	Under 500 PSI (low)
How it cleans	Water force blasts dirt off	Chemicals dissolve mold, algae and mildew, then a gentle rinse
Best for	Concrete, brick, pavers, stone	Roofs, vinyl siding, painted wood, gutters
Kills organic growth?	No - it rinses the surface	Yes - treats the root, results last longer
Damage risk	High on soft surfaces	Low (chemical misuse is the main risk)

When to pressure wash

Concrete driveways and walkways (oil stains, tire marks, years of grime).
Patios and pavers.
Brick and stone walls.
Fences made of hard materials.

When to soft wash

Roofs - asphalt shingles lose granules under high pressure. Soft washing is the industry standard for roof cleaning.
Vinyl siding - high pressure forces water behind panels and damages seals.
Painted or stained wood - decks, trim and fences.
Any surface with visible black streaks, mold or algae - pressure alone will not fix the root cause.

Cost comparison (2026, average US home)

Job	Method	Typical range
Concrete driveway (1,000 sq ft)	Pressure	$180 - $300
House siding (1,500 sq ft)	Soft wash	$250 - $450
Roof (1,500 sq ft)	Soft wash	$350 - $700
Deck (wood)	Soft wash + gentle rinse	$150 - $400

Soft washing typically runs 10-30% higher because chemicals and technique cost more - but the results last months longer, which is why customers accept the price.

Why operators offer both

Offering both methods doubles your addressable jobs and protects you from damage claims. A full exterior package (soft-washed roof and siding + pressure-washed hardscape) is the highest-margin product in residential exterior cleaning, typically $400-$900 per home. Price the whole package with the free estimator, send a branded quote, and collect payment online with SudsQuote.

SudsQuote - free pressure washing estimator. Always consult a professional before cleaning roofing or painted surfaces.