What Surfaces Can Be Pressure Washed?

The Quick Answer

You should only use high-pressure washing on porous, incredibly hard surfaces like poured concrete or solid masonry. everything else—including vinyl siding, roofs, and wood decks—should be washed using low-pressure chemical methods.

Surfaces Perfect for High Pressure

• Driveways and sidewalks
• Brick walkways and patios
• Exposed aggregate and durable pavers

Surfaces That Should Never Be Pressure Washed

Using a high-pressure stream on the following surfaces will cause thousands of dollars in permanent damage:

• Asphalt Shingle Roofs: Will instantly blast away the protective ceramic granules, destroying the roof.
• Vinyl Siding: High pressure can easily crack old vinyl or blast water horizontally underneath the seams, causing mold behind the walls.
• Wood Decks & Fences: High pressure scars the wood, leaving permanent wand marks and 'furring' the fibers.

How to Avoid Costly DIY Damage

If you're tackling a weekend project, always start with the widest fan nozzle available and test a hidden corner. If you are trying to clean a deck, roof, or home siding, strongly consider hiring a professional who specializes in soft washing.