Yes — power washing can remove algae, but for long-lasting results, it must be done with the correct soft-washing detergents. Pressure alone will blast the green layer off the surface, but it will not kill the roots (spores) embedded in porous materials like concrete, vinyl siding, stucco, pavers, brick, and stone. This means algae typically regrows quickly — often within 60–90 days.
Professional contractors listed on the PowerWashing.com Directory use algae-killing solutions and low-pressure techniques that eliminate organic growth safely and help prevent it from returning.
Here’s the full breakdown:
⭐ 1. Pressure Washing Alone Only Removes the Surface Layer
Using high pressure by itself:
This is why many homeowners notice the green film returning shortly after DIY cleaning.
⭐ 2. Soft Washing Is the Correct Method for Algae Removal
Soft washing uses:
This method:
It’s the industry standard for siding, roofs, fences, and delicate materials.
⭐ 3. Why Does Algae Grow on Homes?
Algae thrive in:
It typically appears as:
The right detergents break this organic growth down at the molecular level.
⭐ 4. Surfaces Most Commonly Affected by Algae
Very common:
Extremely common on roofs:
Soft washing is the preferred method to protect roofs from damage.
⭐ 5. How Long Does Algae Stay Gone After Cleaning?
With proper soft washing, algae may stay gone for:
Many homeowners schedule annual or semi-annual maintenance cleanings to prevent buildup.
Contractors sometimes apply post-treatment solutions that slow regrowth even further.
⭐ 6. Why Professional Algae Removal Is Better
Professionals use:
Using too strong of a chemical mix can:
Professionals listed on PowerWashing.com/Directory are trained in algae removal that is safe, effective, and long-lasting.
⭐ 7. DIY vs Professional Results
DIY cleaning often leads to:
Professionals provide the correct balance between detergent strength, water flow, and soft washing technique.
