What Can (and Can’t) Be Safely Power Washed Around Your Home: A Homeowner’s Practical Guide

Jul 14

Power washing, also known as pressure washing, is a highly effective method for cleaning exterior surfaces using high-pressure water spray. It can remove dirt, mold, mildew, algae, and stains, making your home look fresh and well-maintained. However, not all surfaces are safe for this method. Misusing a power washer can cause serious damage to your property or even lead to costly repairs.

In this guide, we’ll cover what can and cannot be safely power washed around your home. You'll also learn why surface material, age, and finish matter when deciding whether to use power washing. Before deciding what to clean, it’s helpful to understand how power washing contributes to your home’s curb appeal and long-term maintenance.

What You Can Safely Power Wash

1. Concrete Driveways and Sidewalks

Concrete surfaces are durable and well-suited for power washing. Use a high-pressure setting with a surface cleaner attachment for even results. It’s effective for removing oil stains, dirt, and mildew.
Tip: Avoid using chemicals unless necessary; hot water alone is often enough for grime.

2. Vinyl Siding

Vinyl siding can be power washed safely when done correctly. Use a low-pressure setting with a wide spray pattern to prevent cracking or water infiltration behind the siding panels.
Important: Always spray at a downward angle and avoid directing water near seams or electrical outlets.

3. Wood Decks (with Caution)

Wood decks can be power washed, but you must use a low-pressure setting to avoid splintering the wood or removing protective coatings. Softwoods like cedar and pine are especially sensitive.
Recommendation: Follow up with sanding and resealing if you remove any finish.

4. Fencing (Vinyl and Some Wood)

Vinyl fences handle power washing well. For wood fences, similar precautions as wood decks apply—use low pressure and test a small area first.

5. Brick and Stone Patios (Mortar-Intact)

Most brick and natural stone can withstand power washing. Make sure mortar joints are solid and avoid harsh chemicals that might erode the material. Use a fan tip nozzle and maintain a consistent distance.

For indoor areas like hardwood floors, especially those exposed to leaks or spills, proper maintenance and timely repair are key to long-term preservation.

What You Should Not Power Wash

1. Asphalt Shingles

Alternative: Use a soft wash system or hire a roof cleaning specialist.

2. Old Mortar and Crumbling Brickwork

Recommendation: Consider gentle hand cleaning or low-pressure rinsing instead.

3. Windows and Glass Doors

Safe Practice: Use a soft brush and hose for cleaning windows and sliding glass doors.

4. Electrical Fixtures and Panels

Tip: Cover electrical elements with plastic sheeting if you need to clean nearby.

5. Painted Surfaces (Unless Stripping)

Alternative: Use low-pressure and test an inconspicuous area if unsure.

In some cases, soft washing may be a safer alternative, especially for delicate surfaces.

Additional Surfaces to Consider With Caution

1. Stucco and Dryvit

Use very low pressure and avoid standing too close. A soft wash method is generally safer.

2. Outdoor Furniture

Recommendation: Use a low-pressure nozzle and keep the wand at least 2 feet away.

General Power Washing Tips

Use the Right Nozzle: A 25- or 40-degree tip is safest for most home applications.
Maintain Distance: Stay at least 12–18 inches away from surfaces to prevent damage.
Use Detergents Properly: Choose cleaning solutions labeled safe for your surface and rinse thoroughly.
Test First: Always test in a small, hidden area to check for adverse reactions.
Wear Protective Gear: Safety glasses and gloves are essential to prevent injuries from debris or chemicals.

When to Hire a Professional

If you're unsure whether a surface is safe to power wash—or if it’s located high or near sensitive areas—it’s best to contact a licensed pressure washing contractor. They have the right tools and experience to avoid costly mistakes. This is especially true for multi-story homes, large roofs, and historic properties.

Conclusion

Power washing can make a big impact on your home's appearance and maintenance—but only when used on the right surfaces. Concrete, vinyl, and properly sealed wood can benefit from routine pressure washing. However, asphalt shingles, fragile mortar, and electrical components should always be avoided. Understanding how often to perform routine power washing can help prevent buildup before it causes damage.

When in doubt, choose a gentler method or consult a professional. Knowing what can and can’t be safely power washed helps extend the life of your home materials while keeping everything clean and safe.

Frequently Asked Questions

1. Can I power wash my home’s roof?

No, especially not if it's an asphalt shingle roof. Power washing can remove granules and reduce lifespan. Use a soft wash system instead.

2. Is it safe to power wash painted siding?

Not unless you want to strip the paint. It’s better to use a low-pressure wash or clean by hand.

3. What pressure is best for cleaning wood decks?

Use 500–600 PSI for softwoods and up to 1200 PSI for hardwoods. Always use a wide spray tip.

4. Can I use a pressure washer to clean outdoor cushions?

No. The high pressure can tear fabric or damage stitching. Use mild soap, a brush, and hose rinse instead.

5. Should I use hot or cold water for power washing?

Cold water is sufficient for most home tasks. Hot water is more effective for grease or oil on concrete but requires special equipment.