DIY vs Professional Pressure Washing in Spokane
A rented machine will clean a Spokane patio just fine. It is the siding, the roof, and the second story where a DIY pressure washing job turns into a repair bill. Here is the honest split.
Or call (509) 213-1891. Tell the crew what needs cleaning and most jobs get a free estimate on that same call.
Serving Spokane, Spokane Valley, Mead, Liberty Lake, and Cheney.
What can a rented pressure washer actually do?
More than people expect on flat, hard, ground-level surfaces. Much less than people expect on siding, wood, and anything above head height.
Two numbers describe a machine: pressure, measured in PSI, and flow, measured in gallons per minute. Homeowners fixate on the first one. Flow is what actually moves dirt off a surface, which is why a consumer electric unit rated at an impressive PSI still takes an afternoon to do a driveway that a higher-flow machine with a rotary surface cleaner finishes in a fraction of the time.
The attachment matters as much as the machine. A bare wand on concrete leaves the striping people call zebra stripes or tiger stripes, because the spray pattern cleans in overlapping arcs and every pass edge shows. A rotary surface cleaner spins the spray inside a shroud and cleans evenly. If you rent, rent the attachment too, or plan on the stripes.
What a rented machine cannot give you is a soft wash. Soft washing is not a pressure setting, it is a different process built around a cleaning solution, dwell time, and controlled application. That is the process every delicate surface on a house actually needs, and it is covered in detail in the soft washing versus pressure washing comparison.
What does the DIY route cost?
Renting a gas pressure washer for a day typically runs somewhere in the $50 to $100 range in most markets, and consumer-grade electric units for purchase sit in a comparable band, according to the 2026 cost guides published by Angi and HomeGuide. Treat those as a national ballpark rather than a Spokane rental counter price.
That is not the whole number. Add the surface cleaner attachment, the cleaning solution, the fuel, the deposit, the trip to pick the machine up and the trip to take it back, and most of a Saturday. The honest comparison is not machine rental against a professional estimate. It is machine rental plus supplies plus your entire weekend against a professional estimate.
For what the professional side of that comparison looks like by surface, the Spokane pressure washing cost guide lays out the market ranges and the three factors that move them.
Where does DIY go wrong on a Spokane home?
The failures are consistent, and they are all failures of pressure applied to the wrong surface:
- Water behind the siding. Spray angled upward under a vinyl lap forces water into the wall cavity, where nobody sees it until there is a stain on the drywall inside.
- Furred wood. Too much pressure on a deck or fence raises the grain, leaving a fuzzy surface that will not take stain evenly and needs sanding to fix.
- Striped concrete. The classic wand-only result. Visible from the street, and the only fix is redoing the whole slab properly.
- Lost roof granules. The expensive one. High pressure on asphalt shingles strips the protective layer, as the roof moss guide explains in full.
- Blown mortar and window seals. Older Spokane brick and aging glazing putty do not take a direct high-pressure hit well.
- The ladder. A pressure wand kicks back. Holding one at full trigger while standing on a ladder is how people end up on the ground.
Which jobs are genuinely fine to do yourself?
Plenty of them. Anyone who tells you to never touch a pressure washer is selling something.
A small patio slab
Flat, at ground level, and hard enough to take the pressure. Rent the surface cleaner attachment and the result will look even.
Garbage cans and outdoor gear
Bins, garden tools, wheelbarrows, and plastic furniture. No damage risk, no ladder, no consequence if it takes two passes.
A short fence run
Reachable from the ground, at low pressure, with a wide fan tip. Test on a hidden section first to see how the wood reacts.
Touch-up between washes
A stained spot on the walkway or a green patch by the downspout. Small, local, and no reason to schedule anything for it.
Which jobs are not worth doing yourself?
Anything where the downside is a repair rather than a redo. That is a short and predictable list: the roof, second-story siding, any full house wash, a large driveway you want to look even, and commercial frontage where the result is part of how customers judge the business.
Roofs top the list for two separate reasons. Getting it wrong damages the shingles, and getting on the roof to do it is the genuine physical risk in this entire trade. A wet, mossy slope offers no traction, and Spokane spring mornings are exactly when people want to be up there.
House siding is the subtler one, because the damage is invisible on the day. Water forced behind a lap or into a gap around a window does not show up until a stain appears inside, months later, and by then the connection to that Saturday afternoon is easy to miss.
How do time and results compare?
Set the estimate aside for a second and count the day. Pickup, setup, learning the machine, the work itself, the second pass on the parts that did not come clean, breakdown, and return. A full house exterior plus a driveway is not a morning for someone doing it once a year.
The results gap is mostly about knowing which surface takes what. Choosing a tip, setting a distance, mixing a solution, and knowing when a stain is going to lighten rather than disappear are learned things. Old oil in porous concrete, for example, will lighten and often will not vanish, and knowing that in advance is the difference between a good outcome and a disappointing afternoon.
There is also the question of what happens if it goes wrong. A homeowner who furs a deck owns that sanding job. Work done by a local crew here carries a satisfaction guarantee, which is a meaningfully different position to be in.
So is hiring a pro worth it?
It depends entirely on which job you are looking at, and the honest answer splits cleanly. For a patio slab, a bin, or a fence panel, renting a machine is a reasonable weekend. For the house, the roof, the second story, or a driveway you want to look even from the street, the calculation changes: the downside is not a redo, it is a repair, and the surfaces that need a soft wash cannot be done properly with rented equipment at all.
The middle path most Spokane homeowners land on is to hand off the house, the roof, and the main concrete once a year, then handle the small stuff themselves in between. That keeps the risky surfaces with a licensed and bonded local crew using the right process, and it keeps you from paying anyone to hose off a garbage can.
What should you read next?
If you are leaning toward hiring it out, these three cover the rest.
What it costs
Market ranges by surface and the three factors that decide where a Spokane job lands inside them.
See the Spokane Cost Guide →Getting ready
The ten minute prep list for the night before an appointment, and what the crew handles instead of you.
Prep Checklist →House washing
What a soft wash on Spokane siding actually involves, start to finish, and why it is not a pressure setting.
See House Washing →Not sure which side of the line your job falls on? Call (509) 213-1891 and describe it. If it is genuinely a DIY job, you will be told so.
Get your free, no-obligation estimate
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DIY vs. Professional Questions, Answered
The questions Spokane homeowners weigh before they head to the rental counter.
Is it cheaper to pressure wash your house yourself?
On paper, sometimes. Once you add the attachment, the cleaning solution, the fuel, the deposit, two trips to the rental counter, and most of a Saturday, the gap narrows a lot. And the comparison only holds if nothing goes wrong, because a furred deck or water behind the siding turns a cleaning job into a repair.
What PSI do I need to clean a driveway?
Flow matters more than pressure for concrete, which is why a high-PSI consumer machine with a low gallons-per-minute rating still takes an afternoon. The bigger factor is the attachment: a rotary surface cleaner cleans evenly, while a bare wand leaves the overlapping arc marks people call tiger striping.
Can I pressure wash my own vinyl siding?
Siding needs a soft wash, not a pressure setting, and that is a process rather than a dial. Spray angled up under a lap forces water into the wall cavity, and that damage does not announce itself until a stain shows up on the drywall inside months later. It is the wrong surface to learn on.
What does it cost to rent a pressure washer?
Day rental for a gas machine typically falls in the $50 to $100 range in most markets, with consumer electric units for purchase in a comparable band, per the 2026 Angi and HomeGuide cost guides. Those are national ballpark figures, not a Spokane counter price, and they exclude the attachment and solution.
Will a pressure washer damage my deck?
It can, easily. Too much pressure raises the wood grain and leaves a fuzzy surface that will not take stain evenly, and fixing it means sanding the whole deck. Wood wants low pressure, a wide fan tip, and a test on a hidden board before you commit to the visible ones.
Is it safe to pressure wash from a ladder?
No. A pressure wand kicks back when you pull the trigger, and absorbing that recoil while standing on a ladder is how people end up on the ground. Anything that cannot be reached safely from the ground is the point where the DIY conversation should stop.
Can I remove roof moss with a pressure washer?
No. High pressure strips the granule layer protecting asphalt shingles and forces water under the courses, which shortens the life of the roof in a way that cannot be undone. Roofs need a low-pressure soft wash, and the full explanation is on the roof moss guide.
What jobs should I just hire out?
Anything where the downside is a repair rather than a redo: the roof, second-story siding, a full house wash, a large driveway you want even from the street, and commercial frontage. Those surfaces either need a soft wash process or need someone who is not learning on your house.
Do professionals use stronger machines or a different method?
Both, and the method is the bigger difference. Delicate surfaces get a soft wash built around a cleaning solution and dwell time rather than force, while concrete gets high pressure through a rotary surface cleaner. Choosing which surface gets which is most of the skill.
How long does a DIY house wash take?
Longer than people plan for. Count pickup, setup, learning the machine, the work, a second pass on whatever did not come clean, breakdown, and the return trip. A full exterior plus a driveway is a day for someone doing it once a year, and that is before any drying time.