Our climate is very good at growing things you did not plant. The same mild, damp weather that keeps the region green also coats north-facing concrete in moss, darkens siding with algae, and turns a shaded patio slick and black within a season. That growth holds moisture against the surface, and on walkways and stairs it becomes a real slip risk. Regular washing keeps surfaces sound and safe, and the curb appeal comes with it.
How often to pressure wash a house in the Lower Mainland
For most homes here, once or twice a year covers it. A single yearly wash suits a sunny, well-drained lot. Two washes make sense for a shaded property, one under heavy trees, or anywhere the north side stays damp: a spring clean-up to strip the winter's growth, and a late-summer refresh. The one rule that does not bend is timing. Wash in a dry stretch so the surface can dry out afterward, never during a wet week when it never gets the chance.
If you work on a seasonal schedule, add washing to the warm-weather list in my summer home maintenance checklist. Getting the growth off before fall means the surfaces head into the wet season clean.
Match the method to the surface
The mistake I see most is treating every surface with the same wand and the same pressure. A driveway, a cedar fence and vinyl siding all want different handling, and too much pressure does lasting damage that the moss never would. Here is the quick version before the detail:
- Concrete and paver driveways, walkways and patios: full pressure, ideally with a surface-cleaner attachment for an even finish.
- Wood decks and fences: reduced pressure, tip kept moving along the grain, as a gentle clean.
- Vinyl, stucco and fibre-cement siding: soft wash only, meaning low pressure plus a cleaning solution.
Hard surfaces take the pressure
Concrete and paver driveways, walkways and patios are what people picture when they think of pressure washing, and they can take it. Full pressure with a surface-cleaner attachment lifts embedded moss and grime and leaves an even finish, without the stripes you get from waving a bare wand around.
Wood gets a gentler touch
Decks and fences are softer than they look. Too much pressure furs up the grain, gouges the wood, and leaves marks that show through any finish you put on later. I turn the pressure down, keep the tip moving with the grain, and use just enough to lift the dirt and growth. If the wood is heading for stain, that ties into my fence and deck services.
Siding needs a soft wash
Siding is the surface people most often damage. Blasting vinyl, stucco or fibre cement at full pressure can crack it. Worse, it drives water up behind the boards and into the wall, exactly where you never want it. The right approach is a soft wash: low pressure with a cleaning solution that kills the algae and mold, then a gentle rinse. The solution does the cleaning, and the water only rinses it away.
Every job I take gets a written scope before I start, so the price is agreed in advance and the list stays the list.
Want me to take this one on? My page on pressure washing covers what the visit includes, what I hand off, and how I price it.
The slip hazard nobody schedules around
This is the part I wish more people took seriously. Algae on a sloped driveway, a set of front steps, or a shaded walkway gets slick the moment it rains, and our wet months keep it wet for weeks at a stretch. Keeping those surfaces clean is one of the cheapest ways to prevent a fall at home. On any property with sloped access, it is the first thing I clear.
I book pressure washing in Surrey, pressure washing in Abbotsford and the rest of my area into dry stretches, with the steps and walkways first on the list. The full scope is on my pressure washing services page.
When the wash is prep, give it time to dry
If you are washing a deck or fence before staining or painting, the drying time is not optional. Wood can feel dry on top while it still holds water inside, and finish over damp wood does not bond. Cabot's deck guide says to let a washed deck dry for two to three days before staining. Wash, wait for dry wood, then coat. The full timing for a deck is in when to stain or refinish a deck.
