Power Wash Exterior Surfaces
Nothing revives a home's appearance faster than power washing. Years of grime, mildew, and stains disappear in hours, making everything look freshly installed.
Quick Summary
2-4 hours
$50-100 rental
Moderate
Very High
The Dramatic Difference
Power washing removes years of accumulated dirt, algae, mold, mildew, and pollutants. It's not unusual to think you need new concrete or siding, only to discover the original surface looks brand new after a thorough cleaning.
This is also essential prep work before painting or staining. Paint adheres poorly to dirty surfaces, and you'll see any issues clearly once the grime is gone.
PSI Guide by Surface
| Surface | PSI Range | Nozzle |
|---|---|---|
| Vinyl siding | 1300-1600 | 25° (green) or 40° (white) |
| Wood siding | 1200-1500 | 25° (green) or 40° (white) |
| Brick | 1500-2000 | 15° (yellow) or 25° (green) |
| Concrete driveway | 2500-3000 | 15° (yellow) or surface cleaner |
| Wood deck | 1200-1500 | 25° (green) or 40° (white) |
| Composite deck | 1500-1800 | 40° (white) |
When in doubt, start with lower pressure and a wider angle nozzle, then increase if needed.
Equipment Options
Rent (Recommended)
- +Access to professional-grade machines
- +$50-100/day at home improvement stores
- +No storage or maintenance required
- −Need to complete in rental window
Buy
- +Available anytime for small jobs
- +Electric: $150-400, Gas: $300-600
- −Consumer models less powerful
- −Requires storage and winterizing
Step-by-Step Process
1. Prepare the Area
- • Move vehicles, furniture, and planters away
- • Cover nearby plants with tarps
- • Close all windows and doors
- • Cover exterior outlets and light fixtures
- • Sweep loose debris from surfaces
2. Connect and Test
Connect your garden hose, then turn on the water fully before starting the pressure washer. Test spray on an inconspicuous area to verify your PSI and nozzle choice.
3. Apply Detergent (Optional but Recommended)
Switch to the soap nozzle (black) and apply cleaning solution from bottom to top (prevents streaking). Let it sit 5-10 minutes but don't let it dry. Work in manageable sections.
4. Rinse with Pressure
Switch to the appropriate pressure nozzle and rinse from top to bottom. Keep the nozzle 12-18 inches from the surface. Use smooth, overlapping strokes—never hold in one spot.
For siding: work at a downward angle to prevent water from getting behind panels.
5. Surface Cleaner for Concrete
A surface cleaner attachment ($50-100) is a game-changer for driveways and patios. It cleans faster and leaves no "zebra stripes" from uneven spray patterns.
Safety Warnings
- !Never aim at people or pets. High pressure can cause serious injury—even at 1500 PSI.
- !Wear closed-toe shoes and safety glasses. Debris flies everywhere.
- !Never use a ladder with a pressure washer. The kickback can knock you off. Rent an extension wand instead.
- !Don't spray electrical panels or utility meters. Water and electricity don't mix.
- !Check for lead paint if home is pre-1978. Power washing lead paint creates hazardous dust—hire a certified contractor.
When to Hire a Pro
Consider professional help if:
- •Your home is taller than one story (ladder safety)
- •You have delicate surfaces like stucco or old brick
- •Significant mold/mildew requires chemical treatment
- •Your home may have lead paint
Pro pricing: $200-500 for average home depending on size and condition.