Pressure washing can transform grimy driveways and weathered siding, but understanding what it actually does—and what it shouldn't—prevents costly damage to your property. Whether you're considering hiring a professional or buying equipment yourself, these answers cut through confusion and get you moving forward.
What's the Difference Between Pressure and Soft Washing?
Pressure washing uses high-velocity water jets (typically 1,500–4,000 PSI) to blast away stubborn dirt, mold, and stains from concrete, metal, and masonry. Soft washing applies lower pressure (under 500 PSI) combined with specialized cleaning solutions and works slowly on delicate surfaces like wood siding, roof shingles, and painted finishes. Soft washing takes longer but prevents etching and wood damage that high pressure can cause. If your contractor doesn't ask what surface you're cleaning, that's a red flag.
How Much Does Professional Pressure Washing Cost?
Typical pricing ranges from $200–$600 for a standard residential driveway (1,000–1,500 sq ft) and $300–$1,500 for whole-house cleaning, depending on square footage, surface type, and local demand. Roof cleaning runs $400–$800, while deck cleaning costs $0.10–$0.30 per square foot. Some companies charge hourly rates ($75–$150/hour) instead. Always get multiple quotes—Mercoly makes it easy to compare pricing and reviews from trusted pressure and soft washing providers in your area.
What Surfaces Can Be Pressure Washed Safely?
Safe for high-pressure washing:
- Concrete driveways and sidewalks
- Brick and stone masonry
- Metal siding and fences
- Tile and slate
- Hardscape features (pavers, retaining walls)
Better suited for soft washing or low pressure:
- Wood decks and fences (can splinter and erode)
- Vinyl siding (can crack under pressure)
- Asphalt shingles (can strip granules)
- Stucco (prone to cracking)
- Painted surfaces (can peel finish)
Ask your contractor which method they're using before work begins. Overaggressive pressure on delicate surfaces voids warranties and causes expensive repairs.
How Often Should I Pressure Wash?
Most residential properties benefit from cleaning every 12–24 months, though climate and environment matter significantly. Coastal areas with salt spray, humid regions with mold growth, or properties near trees may need annual cleaning. Driveways in areas with heavy rainfall often stay cleaner longer. If you're selling your home, a fresh pressure wash weeks before listing can boost curb appeal, but don't do it immediately before showing—wet surfaces look different.
Is It Better to Hire a Pro or Rent Equipment?
Hiring a professional makes sense if you're cleaning more than 1,000 square feet, need soft washing (which requires specific chemicals), or want to avoid potential surface damage. Professionals carry insurance and know local regulations about runoff. Expect to pay labor costs but gain peace of mind.
Renting typically costs $50–$100/day for a consumer-grade unit. This works for small projects like a patio or light driveway stains if you're comfortable handling equipment. You'll still need to buy or mix cleaning solutions and dispose of runoff responsibly. Rented equipment rarely reaches the PSI or flow rate of commercial machines.
For anything larger or on sensitive surfaces, hiring a licensed professional is the safer bet.
What Should I Ask Before Hiring?
Request proof of liability insurance and ask how they handle runoff and chemical disposal. Confirm whether their price includes pre-treatment solutions or if those cost extra. Ask which pressure and method they recommend for your specific surfaces—a good contractor matches the job to the tool, not the other way around. Finally, check reviews specific to pressure washing work, not just general reviews.
Do I Need to Prepare My Property?
Close windows and doors, move outdoor furniture, cover plants sensitive to cleaning chemicals, and trim back vegetation near the area being cleaned. If you have delicate landscaping or pet areas, let your contractor know beforehand. Some companies include pre-treatment of algae or mold; others charge separately. Clarify this in your quote.
Frequently Asked Questions
Q: Will pressure washing damage my driveway? Concrete can handle standard pressure washing (2,500–3,500 PSI), but excessive pressure or technique errors create pitting and surface damage; hire an experienced contractor or use lower pressure if renting equipment yourself.
Q: How long do pressure washing results last? Clean surfaces typically stay fresh for 6–12 months, depending on weather, shade, and foot traffic; coastal or humid properties often need more frequent cleaning.
Q: Is pressure washing safe around my foundation? Yes, when done correctly, but avoid directing water directly into foundation cracks, vents, or underneath the house, and inform your contractor about your home's age and construction type.
Compare quotes from multiple pressure and soft washing professionals in your area to find the right fit for your project.