Hiring the wrong pressure washing company can leave you with damaged siding, stripped paint, or worse—a flooded foundation. The right contractor combines proper equipment, insurance, and experience to safely clean everything from driveways to roof tiles. Before you hand over your keys and your hard-earned money, ask these critical questions.
Does the Company Use Both Pressure and Soft Washing?
Not every job needs a 3,000 PSI blast. Soft washing uses lower pressure (usually under 500 PSI) with specialized detergents, making it essential for delicate surfaces like vinyl siding, roof tiles, and stucco. A reputable company should own both types of equipment and know when to use each one. Ask them directly: "Will you soft wash my roof, or will you use a pressure washer?" The wrong choice can cost thousands in repairs. If they only own one setup, they're likely to use it everywhere—a red flag.
What Insurance and Licensing Do They Carry?
Pressure washing isn't regulated the same way as roofing or electrical work in most states, but that doesn't mean contractors should skip insurance. Ask for proof of general liability insurance ($1–2 million minimum) and workers' compensation if they employ staff. Request their business license number and verify it with your local contractor licensing board. Ask: "Are you insured if something gets damaged during the job?" If they hesitate, walk away. Many states also require bonding for larger jobs; clarify this upfront.
What Are Your References and Track Record?
A quality pressure washing company will happily provide three to five recent residential references—ideally within the last six months. Call them. Ask specifically: "Did they show up on time? Was the work thorough? Did they clean up afterward? Would you hire them again?" Also request before-and-after photos of similar jobs. If they cleaned a brick home like yours, or a roof similar to your material, that's valuable proof of capability.
What's Your Pricing Structure?
Pressure washing prices typically range from $300–$800 for a standard driveway, $800–$2,500 for a full house exterior, and $1,500–$4,000+ for roof cleaning, depending on size and condition. Ask if they charge by square footage, hourly rate, or flat rate. Get at least two written estimates and compare the details—a lowball quote often means cut corners or incomplete work. Clarify what's included: Do they move planters? Protect landscaping? Seal driveways afterward? Request the estimate in writing; verbal quotes disappear when disputes arise.
What Equipment and Cleaning Solutions Will Be Used?
Ask about their pressure washer PSI, GPM (gallons per minute), and heating capabilities. Professional equipment typically runs 3,000–4,000 PSI for concrete and wood decks. For soft washing, they should use biodegradable detergents that won't harm plants or pets. Inquire: "What chemicals will you use on my surfaces?" Get the product names, and research them yourself if you have concerns. Temperature matters too—hot water cleans faster and removes oil better than cold, but it costs more.
What's Your Timeline and Preparation?
Ask how long the job will take. A driveway typically takes 2–4 hours; house siding takes a full day; roof cleaning can span 1–2 days. Confirm what you need to do beforehand: moving vehicles, securing outdoor furniture, turning off exterior outlets, or closing windows. Will they protect your air conditioning unit, electrical box, and window wells? These details prevent expensive surprises.
What's Your Warranty or Guarantee?
Reputable companies often guarantee their work for 30–90 days. This means if streaking, missed spots, or damage appears shortly after, they'll return free. Ask: "What happens if I'm not satisfied?" Get the answer in writing, including any conditions or exclusions.
Platforms like Mercoly let you compare multiple pressure and soft washing providers side-by-side, read verified reviews, and request quotes—saving you the legwork of vetting each company individually.
Frequently Asked Questions
Q: Is soft washing safe for all roof types? Soft washing is safe for asphalt shingles, cedar, and tile roofs, but pressure washing can be risky on delicate materials; always confirm your roof material and have your contractor specify their method beforehand.
Q: How often should I have my driveway pressure washed? Most homeowners benefit from pressure washing their driveway every 1–2 years, depending on climate, foot traffic, and staining; annual cleaning is common in wet or shaded regions.
Q: Can pressure washing damage my home's exterior? Yes—excessive PSI or improper technique can strip paint, crack wood, or force water into walls; this is why hiring an experienced, insured contractor is essential.
Get quotes from trusted pressure washing providers today and protect your property investment.