When it comes to exterior cleaning, many homeowners assume "pressure washing" means blasting everything with high-pressure water. But for many surfaces around your Nanaimo home, that approach causes more harm than good.
What's the Difference?
Pressure washing uses high-pressure water (typically 2,500-4,000 PSI) to blast away dirt, grime, and stains. It's effective on hard surfaces like concrete driveways, sidewalks, and patios.
Soft washing uses low-pressure water (under 500 PSI) combined with specialized cleaning solutions that kill organic growth like moss, algae, mold, and mildew. The chemicals do the work, not the pressure.
When to Use Pressure Washing
- Concrete driveways and sidewalks
- Stone or brick patios
- Some types of fencing
- Metal surfaces (with care)
When to Use Soft Washing
- Asphalt shingle roofs
- Cedar shake roofs and siding
- Vinyl and aluminum siding
- Stucco exteriors
- Wood decks and fences
- Painted surfaces
The Risks of Using the Wrong Method
High pressure on delicate surfaces can strip paint, damage siding, remove protective granules from shingles, and even drive water into wall cavities. It can also etch concrete if used incorrectly.
A professional exterior cleaning company matches the method to the surface. Learn more about our soft washing services or pressure washing in Nanaimo.
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Pick the method from the surface, not the machine
The useful question in Nanaimo is not which washer is stronger. It is which surface you are standing in front of. Concrete, brick, and stone can take a controlled high-pressure rinse for oil, silt, and tyre marks. Asphalt shingles, cedar, painted wood, stucco, and most fences cannot. Those surfaces fail when water is forced into laps, grain, or hairline cracks.
Soft washing is the low-pressure method. The cleaning solution does the work on organic growth, then a rinse carries it off. On this site, soft washing in Nanaimo is the service for roofs, decks, fences, and other delicate surfaces. Pressure washing in Nanaimo is the service for driveways, patios, sidewalks, and similar hard surfaces. House siding and a full-home exterior sit on a third page, house washing in Nanaimo, because vinyl, Hardie board, stucco, and cedar siding are a different scope from a roof or a driveway.
What each visit is for
Use pressure washing when the soil is stuck to something hard. Driveway oil, patio silt, moss film on concrete pavers, and sidewalk grime respond to pressure because the surface is not a shingle or a board. Keep the wand moving, and do not chase a wood deck with the same tip you used on the apron. A deck that looks like concrete from ten feet away is still wood or composite once you are on it.
Use soft washing when the problem is alive. Algae streaks, moss, lichen, and the black film on shaded siding are biological. Pressure knocks the top off and leaves the growth in the pores. Soft wash is also the right conversation for a roof. High pressure on asphalt lifts granules. High pressure on cedar frays the shake. If the green is a thick mat on the roof, that job is roof moss removal, not a driveway wash with the wand tipped upward.
- Driveway, walkway, brick patio: pressure washing, with care around mortar and joints.
- Roof, cedar, fence, and deck boards: soft washing.
- Vinyl, Hardie, stucco, or a whole-house exterior: house washing.
- Glass: window washing, after the walls and roof are done so dirty water is not the last thing on the pane.
Wet winters change the order
Coastal winters on Vancouver Island keep north walls and under-tree surfaces damp. Algae on siding and moss on a shaded patio both get worse once the rains settle in. That does not mean every surface gets the same machine in October. A sensible fall order is roof and gutters first, then walls and fences, then flatwork, then glass. Rinse from the dirty work should not be the last step on windows you just cleaned.
Salt air near the water adds a film on glass and metal, but it does not turn a shingle roof into a concrete pad. Oceanfront houses still need the soft wash conversation for the roof and the cedar, and a separate conversation for the driveway. Fall soft wash for siding covers the wall side of that split.
How to describe the job when you ask for a quote
Say what the surface is, how much of it is green versus stained, and whether trees cover it. A photo of the driveway and a photo of the roof are two different quotes. Mention plants under the work area, and any rain barrel that collects off the roof, so the crew can plan the rinse.
The published ranges live on the service pages, not in a blended package price. Pressure washing in Nanaimo typically ranges from $150-$500 depending on the size of the area being cleaned. Soft washing in Nanaimo typically ranges from $200-$700 depending on the surface area and type of cleaning needed. Those are the figures on those two pages. A house with both a driveway and a roof needs both scopes priced, not an average of the two.
Related articles
- Moss on Nanaimo roofs, and what to do about it
- Seven signs a Nanaimo home needs exterior cleaning
- Fall soft wash for Nanaimo siding
Book the delicate surfaces through soft washing in Nanaimo, and hard flatwork through pressure washing in Nanaimo.