What a Good Pressure Wash Actually Fixes Around Your House

What a Good Pressure Wash Actually Fixes Around Your House

Ask any contractor and they'll tell you the same thing: homeowners rarely notice how dirty the outside of their place has gotten. It happens too slowly. Then one driveway gets cleaned on the street and suddenly everything else looks tired. If that sounds familiar, hiring pressure washing services is usually the fastest way to turn things around, and it costs a fraction of what a repaint or a replacement would.

The stuff you stop seeing

Rain, pollen, car exhaust and plain old humidity all leave a film behind. In shady spots, algae moves in. You'll spot it as green or black streaks on siding, on the bottom of fences, and along the north side of the house where the sun barely reaches. Oil drips add dark patches to garages and driveways.

A garden hose won't touch most of it. Scrubbing with a brush works for a small patch, but nobody wants to scrub a whole two-story wall by hand.

Driveways and walkways

Concrete looks solid, but it's full of tiny pores. Oil, tire marks and rotting leaves soak right in, which is why a driveway can look stained even right after sweeping. High pressure pulls that gunk back out of the surface.

Old oil stains are the exception. They sometimes need a degreaser first, and a really old one may fade instead of vanish. Any decent crew will tell you that upfront.

There's also a safety angle people forget. Algae on steps and paths gets slick when it's wet, and a slippery front walkway is a real risk if you have kids or older relatives visiting.

Siding and walls

This is where the wrong approach can cost you. Vinyl handles pressure fine. Older wood, painted surfaces and stucco don't. Blast them too hard and you can chip paint or drive water in behind the boards, and that moisture problem might not show up for months.

So a lot of pros switch to a softer method for delicate surfaces. They apply a cleaning solution, let it sit and kill the growth, then rinse with lower pressure. It takes a bit longer, but nothing gets damaged.

Cleaning also helps paint last. Mildew holds moisture against the wall, and constant moisture is what makes paint peel in the first place.

Decks, patios and fences

Outdoor spaces get the most use, so they show wear first. Wood decks go gray and slippery. Patio stones fill up with moss between the joints. Fences pick up that green film that makes a nice yard look neglected.

If you plan to stain or seal the deck, clean it first. Sealer over dirt won't grip, and you'll see it peeling by next summer. That's a weekend of work wasted, and it happens all the time.

Doing it yourself

Nothing wrong with trying. Renting a machine for a Saturday is fine for a driveway or a small patio. Just know the usual mistakes. A narrow, powerful tip can gouge softwood in a second. Uneven passes leave stripes on concrete that you'll see forever. And spraying upward at siding forces water under the panels.

Ladders are the other issue. A wet ladder, a heavy hose and a kickback from the wand is a bad mix at second-floor height. For anything above the ground floor, most people are better off paying someone.

How often is enough?

It depends on where you live and how much shade you have, but as a rough guide:

Driveways and walkways do well with a wash once a year. Siding can go a year or two between cleanings. Decks and fences vary, though damp, shaded ones need attention more often. If your house sits under trees or in a humid area, expect the green stuff to come back faster.

Selling soon? A clean exterior is probably the cheapest curb appeal upgrade there is. Buyers make up their mind in the first few seconds, before they even reach the door.

Choosing a company

Before you book, ask a few simple things. Are they insured? Do they change their method depending on the surface? Do they have before-and-after photos from real jobs? Will they cover plants and outdoor outlets before they start?

Get the quote in writing, too. And pay attention to how they communicate. If they show up on time and explain the plan without rushing, the job itself usually goes the same way.

Worth doing before it gets bad

Dirt and moisture don't stay on the surface forever. Left alone, they end up as peeling paint, rotting wood and stained concrete that's harder to fix. A cleaning every year or two keeps that from happening, and it makes the house look better on day one. If you can't remember the last time yours was washed, that's probably your answer.