Short answer: You technically can, but it is not the right tool: a pressure washer can dent gutters, blow sealant loose at the seams, or knock a section loose from the fascia. A clean-out by hand, clearing leaves and debris and flushing the downspouts, is the safer and more thorough way to get gutters actually clean.
Why pressure is risky on gutters
Gutters are thin metal, held on with brackets and sealed at the seams, and a concentrated stream of high pressure can dent the material, blow out old sealant, or pop a section loose from the fascia board behind it. None of that is easy to notice from the ground until water starts overflowing somewhere it should not.
A downspout aimed with too much pressure can also get pushed loose at its joints, which turns a cleaning job into a repair job.
What a proper clean-out actually does
Clearing the leaves, twigs and debris out by hand, then flushing the downspouts to make sure water runs through freely, is what actually gets a gutter functioning again. That is a different job from just spraying water at the outside of the gutter, which does not touch the debris sitting inside it at all.
The black tiger stripes are a separate issue
The dark streaks running down the outside of gutters are oxidation and grime, not the leaves and debris clogging the inside, and they need a different approach to lift off. Brightening those stripes is handled by hand as its own add-on, separate from the inside clean-out.
What can go wrong with a DIY attempt
Standing on a ladder to aim a pressure washer at gutters carries the same fall risk as any ladder work, on top of the dent and seam risk to the gutter itself. A clean-out by hand from a ladder still carries fall risk, which is part of why many homeowners hand this one off rather than doing it themselves.
What it costs to have done
Puma's gutter clean-out runs $175 for a one-story home, $199 for a larger one-story, and $249 for two stories, with brightening for the tiger stripes priced separately at $95 or $145 depending on the job.
In Volusia County
Volusia County property records show 56% of homes in the county were built before 1990 meaning plenty of older gutters, brackets and seams that show dents and leaks fast if pressure is aimed at them directly. Puma's price list runs a gutter clean-out at $175 to $249 depending on the home, with brightening added separately at $95 or $145.
Questions people ask
Will pressure washing at least clear the leaves out?
It might knock some loose, but it will not reliably clear heavier debris or flush the downspouts the way a hands-on clean-out does, and it risks denting the gutter in the process.
Are the black stripes on my gutters from clogged debris?
No, those stripes are oxidation and grime on the outside surface, unrelated to whatever is clogging the inside. They are handled with a separate brightening step.
How often do gutters need a clean-out?
Most homes need one once or twice a year, more often under oak or pine trees that drop debris regularly.
Can a pressure washer loosen my downspouts?
Yes, aiming too much pressure at a downspout joint can push it loose, turning a cleaning job into a repair.
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