ServiCover📌 Key Takeaway: Use high pressure on hard surfaces like concrete and brick. Use soft washing — low pressure plus cleaning solution — on siding, roofs and painted surfaces, where high pressure can cause expensive damage.
The Three Methods
| Method | Pressure | Water | Cost / sq ft |
|---|---|---|---|
| Pressure washing | High | Cold | $0.08-$0.20 |
| Power washing | High | Hot | $0.35-$0.77 |
| Soft washing | Low | With cleaning solution | Varies; often priced per job |
Which Method for Which Surface
| Surface | Recommended Method |
|---|---|
| Concrete driveways and sidewalks | Pressure or power washing |
| Oil-stained garage floors | Power washing (hot water) + degreaser |
| Vinyl, aluminum and painted siding | Soft washing |
| Asphalt shingle roofs | Soft washing only |
| Wood decks and fences | Low pressure or soft washing |
| Brick and stone | Moderate pressure, with care around mortar |
Why Roofs Need Soft Washing
Dark streaks on shingles are often algae. High pressure can strip protective granules and shorten a roof's life — and some shingle warranties warn against it. Soft washing kills the algae with cleaning solutions and rinses gently.
Protecting Plants and Property
Soft-wash solutions can harm plants if not managed. Professionals typically pre-wet and rinse landscaping and cover sensitive plants. Ask what products they use and how they protect your yard.
Frequently Asked Questions
Is soft washing as effective as pressure washing?
For organic growth like mold, mildew and algae, soft washing is often more effective because it kills growth rather than just blasting the surface.
Can I soft wash myself?
It's possible with the right equipment and products, but mixing and applying chemicals safely takes care. Many homeowners hire this out.