There is nothing quite as satisfying as watching a pressure washer blast away a winter's worth of dirt and grime from your driveway. It is the ultimate instant gratification project to get your Chico home ready for summer barbecues.

However, before you rent a machine and start spraying everything in sight, you need to know the ground rules. In the real estate world, we see DIY pressure washing disasters all the time. Using too much pressure on the wrong material can easily cause thousands of dollars in permanent damage to your home's exterior.

Here are the crucial do's and don'ts of washing your house this spring.

The Golden Rule: Pressure Washing vs. Soft Washing

The most important thing to understand is that not all exterior cleaning is the same.

Pressure washing uses high pressure water (usually between 1,500 and 3,000 PSI) to forcefully blast dirt off hard, durable surfaces.

Soft washing uses low pressure water (under 500 PSI, similar to a garden hose) combined with specialized, biodegradable cleaning solutions. The chemicals do the heavy lifting to kill algae, mold, and dirt at the root, and the low pressure water simply rinses it away.

Knowing when to use which method is the key to protecting your property.

The DO's of Exterior Cleaning

DO stick to hard surfaces for high pressure. Traditional pressure washing is fantastic for concrete driveways, stone walkways, and brick patios. These hard surfaces can handle the force without sustaining damage.

DO test a small, hidden area first. Before you tackle the entire patio, test your pressure washer on a small corner. Start with a wide 40 degree nozzle from a few feet back. This ensures the pressure is not so intense that it etches or pits the concrete.

DO protect your landscaping and outlets. If you are using cleaning chemicals, thoroughly water your plants and grass beforehand so they do not absorb the soapy runoff. Always cover outdoor electrical outlets, lighting fixtures, and doorbell cameras with painters tape and plastic.

The DON'TS of Exterior Cleaning

DON'T pressure wash stucco or wood siding. This is the single biggest mistake homeowners make. High pressure water can literally punch holes right through foam backed stucco. On wood or vinyl siding, the pressure can force water up and underneath the planks, trapping moisture in your walls and causing hidden rot. You should strictly use the "soft wash" method for all siding.

DON'T blast your roof shingles. Never take a pressure washer to your roof. The high pressure spray will instantly blast away the protective asphalt granules that coat your shingles. This will drastically shorten the lifespan of your roof and likely void your warranty.

DON'T aim directly at your windows. The force of a pressure washer is strong enough to shatter glass. Even worse, it can easily destroy the watertight seals around the window frame, leading to foggy dual pane windows and interior water leaks. Always wash windows by hand.

The Bottom Line

A freshly cleaned exterior is one of the fastest and cheapest ways to boost your home's curb appeal. Just remember to treat your home's delicate surfaces with care. When in doubt, call a local exterior cleaning professional who specializes in soft washing.

If you are getting your house ready to hit the market this summer, let's connect. I can walk through your property and tell you exactly which exterior touch ups will actually bring you the best return on your investment.

Are you ready to make a move this year? Let's talk.

Sources

Bob Vila

This Old House