The average cost for pressure washing services is around $0.35 to $0.77 per square foot, with a typical house costing $170 to $310 and a deck or driveway costing $100 to $260. The average hourly rate for professional mobile pressure washing services is $100 to $200 per hour.

A pressure washer uses a motor to power a pump that pressurizes water, typically to 1,500 to 3,000 PSI (pounds per square inch). This high-pressure water is then forced through a small nozzle, which increases the velocity of the water and creates a powerful jet spray.

The high-pressure water jet from the nozzle blasts away dirt, grime, and other buildup from surfaces like siding, decks, driveways, etc. The pressure can be adjusted using different nozzle tips to avoid damaging the surface being cleaned.

Pressure washing is effective for removing loose paint, mold, grime, dust, mud, and other types of dirt and buildup from a variety of surfaces. A pressure washer can clean siding, decks or patios, driveways, some types of roofs, fences, outdoor furniture, garbage cans, and vehicles. However, it’s important to use the proper nozzle to avoid damaging the surface.

There are a few surfaces that should not be pressure washed. In general, pressure washing any delicate, fragile, or electrical surface should be avoided. Caution is advised when pressure washing older structures or materials as well. You should not pressure wash the following surfaces:

• Asphalt shingles
• Stained wood
• Lead paint
• Old mortar
• Windows
• Gutters
• Electrical panels and meters
• Vehicles unless using a low-pressure setting

Power washing uses heated water, typically 140 to 180°F, to help break down and remove stubborn dirt, grime, and stains. Power washing is more effective for heavy-duty cleaning like cleaning concrete patios and decks. Also, power washing often uses detergents and cleaning solutions in addition to high-pressure water.

Pressure washing uses regular-temperature water without added heat. It is best suited for light cleaning tasks and cleaning more delicate surfaces with caution. Most pressure washers rely solely on the water stream without additional cleaning solutions or chemicals. Pressure washing is often a DIY project for homeowners.

Asking these key questions will help you identify a reliable, qualified pressure washing service that can safely and effectively clean your property:

• Are you insured against damages?
• How are your technicians certified?
• Can you explain your cleaning process? 1
• How do you wash windows?
• Can you provide before and after photos of your work?
• Do you offer a satisfaction guarantee?
• What is your timeline for completing the job?
• What do I need to do to prepare for your arrival?
• Can you provide a detailed estimate?

Taking the time to vet potential companies is important to avoid damage or disappointment. Consider these suggestions:

• Ensure the company is licensed, insured, and has properly trained technicians. This protects you from liability if anything goes wrong.
• Look for reviews, ratings, and references to gauge the company's reputation and quality of work.
• Ask about their cleaning methods, solutions used, and the quality of their pressure washing equipment. This ensures they can effectively clean your surfaces without causing damage.
• Get multiple quotes, but don't just choose the cheapest option. Look for a company that offers a satisfaction guarantee on their work.
• Consider companies that use biodegradable, environmentally friendly cleaning products. This is better for the environment.
• Ensure the company can work within your timeline and communicate openly throughout the process.