Power wash exterior

Power wash your home's exterior to remove dirt, mold, and mildew.

Why it matters#

Years of dirt, mold, and pollution dull your home's appearance and can damage siding over time. Power washing restores curb appeal and protects your investment.

What you'll need#

Tools#

Pressure washer (1,500-2,500 PSI)
Extension wand
Various spray tips (25-40 degree)
Garden hose
Safety glasses

Materials#

Exterior cleaning solution (optional)
Plastic sheeting (to protect plants)

Steps#

1. Prepare the area#

Close all windows and doors. Cover nearby plants, outdoor furniture, and electrical outlets with plastic.

2. Clear loose debris#

Sweep or brush away loose dirt, cobwebs, and debris from surfaces you'll be washing.

3. Connect and test the pressure washer#

Connect the garden hose and power washer. Test on an inconspicuous area to ensure pressure isn't too strong for your siding.

4. Choose the right tip#

Use a 25-40 degree (green or white) tip for most siding. Never use the 0-degree (red) tip on siding—it will cause damage.

5. Start from the bottom#

Work from the bottom up to prevent streaking. This ensures dirty water runs over already-wet surfaces.

6. Maintain proper distance#

Keep the nozzle 12-18 inches from the surface. Closer can damage siding; farther reduces effectiveness.

7. Work in sections#

Clean one section at a time, using overlapping strokes. Don't linger in one spot.

8. Apply cleaner for tough stains (optional)#

For mold, mildew, or heavy staining, apply cleaning solution, let it dwell for 5-10 minutes, then rinse.

9. Rinse from top to bottom#

Final rinse should go from top down to wash away all debris and cleaning solution.

10. Clean walkways and driveway#

Use the pressure washer on concrete surfaces for a complete refresh.

Pro tips#

Wash on an overcast day—direct sun causes cleaning solution to dry too fast
Test pressure on a hidden area first; different siding materials tolerate different pressures
Wash siding every 1-2 years, or when you notice dirt, mold, or discoloration
Spring is ideal—removes winter grime before outdoor season

Warnings#

Never aim at windows, vents, or electrical fixtures—high pressure can cause damage or water intrusion
Don't use a ladder while operating a pressure washer—the recoil can knock you off
High pressure can strip paint and damage soft wood—adjust pressure accordingly
Keep the wand moving; lingering causes damage

Consider professional power washing ($200-500 for a typical home) if: you have a multi-story home requiring ladders, delicate surfaces like stucco or old wood, or don't own a pressure washer. Professionals have the equipment and experience to avoid damage.