Pressure washing your house significantly improves curb appeal, but improper technique causes expensive damage. This guide ensures you complete the job safely, effectively, and without harming your home.
Safety must come first. Pressure washer jets can penetrate skin, causing serious injuries. Always wear protective eyewear - a direct hit causes permanent eye damage. Wear sturdy footwear with good grip to prevent slipping on wet surfaces. Use gloves to protect hands. Wear long pants and long sleeves when using pressure washers. Never point the nozzle at people, animals, or yourself.
Before beginning, inspect your home's exterior. Identify fragile elements - window panes, light fixtures, decorative trim, and loose siding. These need special care or avoidance. Check for loose paint or caulk - high-pressure water can remove or damage these. Test a small inconspicuous area first to verify your chosen pressure level doesn't cause damage.
Preparation is crucial. Close all windows and doors securely. Protect outdoor electrical outlets and light fixtures with plastic bags. Move potted plants, patio furniture, and other items out of the way. Shut off exterior electrical systems when possible. Clear debris from gutters before starting.
The right pressure level determines success. For siding, use low pressure (1200-1500 PSI) with a 25-40 degree nozzle. Always maintain distance - typically 12-18 inches from the surface. Never use 0-degree nozzles on siding; the concentrated force causes severe damage.
Work methodically from top to bottom. This prevents dirty water running over already-clean areas. Start at gutters and work downward. Use overlapping passes for even coverage. Maintain consistent distance and angle throughout.
For delicate surfaces - vinyl siding, painted wood, or aged materials - use even lower pressure and wider nozzle angles. When in doubt, start gentle. You can always increase pressure, but you cannot repair damage.
Detergent application improves results dramatically. Apply foam cleaner and let it sit for 10-15 minutes (but not longer - it dries and becomes difficult to remove). This gives the soap time to break down dirt and grime. Then rinse thoroughly with fresh water using gentle pressure.
Gutters and downspouts need careful attention. Don't aim water directly into gutters from below - it forces water into the gutter system and inside the house. Instead, rinse gutters by directing water away from the opening.
Windows require utmost care. The force of a pressure washer can crack glass or force water into window seals. Use low pressure (below 1000 PSI), wide angle nozzles, and maintain significant distance (24+ inches).
Wood siding is particularly vulnerable. The grain can be damaged, creating permanent raised grain that looks terrible and traps moisture. Use lowest pressure, never use 0-degree nozzles, and test an inconspicuous area first. Some wood siding is better cleaned with soft-wash techniques using chemicals rather than high pressure.
Concrete foundations and brick appear sturdy but can be damaged by excessive pressure. Use 2000-2500 PSI maximum, maintain distance, and use 25-40 degree nozzles.
Avoid pressure washing under eaves or directly at roof lines - water forced into these areas causes interior leaks. Clean gutters and fascia with caution, using lower pressure and wider angles.
Never climb ladders while holding pressure washers. Instead, use long wands and hoses that let you work from ground level. Accidents involving ladders and pressure washers are serious.
Be aware of your surroundings. Don't wash near electrical lines. Avoid directing spray toward windows of neighbors. If washing at height, ensure no one is below. Be cautious on sloped roofs.
After washing, allow surfaces to dry completely before assessing your work. Sometimes surfaces look darker when wet. Once dry, you'll see the true results.
Plan your project for mild weather - not too hot (which dries detergent before it works), not too cold (which prevents proper cleaning), and not rainy (which wastes your work). Overcast days are ideal.
If you're uncertain about any area of your house, hire professionals. One mistake - forcing water into wall cavities or damaging siding - costs thousands in repairs. When in doubt, consult experts or use conservative techniques.
Finally, maintain your pressure washer properly. Drain water and detergent after each use. Store equipment in a protected location. Regular maintenance prevents problems and extends equipment life.
With proper technique, appropriate pressure selection, and careful attention to detail, pressure washing your house results in dramatic improvement. Your home will look freshly painted, increasing its appeal and value.