Pressure-washing guides you can watch.
Short walkthroughs of the exterior-cleaning jobs every San Diego homeowner should know. Each guide comes with step-by-step instructions and a clear line on when to call a pro.
What exterior cleaning can you safely do yourself?
Soft wash basics for siding and roofs
Black streaks on a roof or mildew on stucco aren't pressure problems — they're chemistry problems.
Prep a deck for re-staining
A restained deck only lasts if the old finish is gone and the wood is clean, dry, and open.
Clean the outside of your gutters
The black tiger-stripe streaks on your gutters are oxidized paint binder — and yes, it comes off.
Build an annual exterior-cleaning routine
Two hours of DIY upkeep each spring keeps the place from ever needing a big restoration wash.
When should you stop and call a professional?
Six signs that the problem is past DIY. Turn the system off and pick up the phone — running a system with these issues turns cheap repairs into expensive replacements.
- Black streaks on your roof that won't rinse off
That's Gloeocapsa magma algae, not dirt. It needs soft-wash SH chemistry to kill the organism at the root, not pressure. Pressure will strip your granules.
- Two-story house or steep roof work
Ladder safety and water weight from a soft-wash setup is a real risk. Every year people fall off ladders cleaning their own gutters. Not worth it.
- Etching, stripes, or "zebra" marks on concrete
The last cleaning was too aggressive or the tip was too close. Continuing to clean the same way makes it worse. A surface cleaner with hot water blends it back.
- Rust, oil, or paint stains that rinse-and-scrub won't touch
These need targeted chemistry (F9 Barc for rust, hydrocarbon cleaner for oil, specific strippers for paint). Wrong chemistry can set the stain permanently.
- Graffiti on stucco, block, or brick
Needs solvent chemistry + warm water + the right wand technique. DIY attempts usually drive the paint deeper and leave a shadow that's harder to remove.
- Natural stone — travertine, flagstone, limestone
These react to pH. The wrong cleaner etches permanently. A pro will patch-test and use neutral chemistry before committing to the full job.
What industry resources should I know about?
PWNA — Power Washers of North America
Industry trade association — find certified contractors and homeowner guides.
UAMCCUAMCC — United Association of Mobile Contract Cleaners
Certification body for soft-wash and pressure washing. Public resources on safe methods.
ARMAARMA Roof Cleaning Guidelines
Asphalt Roofing Manufacturers Association — official guidance on cleaning asphalt shingle roofs.
EPAEPA Concrete Wash Water Disposal
How to capture and dispose of pressure-washing wastewater to stay compliant with stormwater rules.
Still stuck? Call a real crew.
If the guide didn't solve it, we probably can. Free on-site estimate, same-week service across San Diego County.