Removal Guide
Roof Cleaning Methods: Professional Soft Washing vs DIY Off The Shelf Cleaners
Understanding the right approach to removing black streaks safely and effectively.
Last updated: August 7, 2026
Quick Answer
According to the Asphalt Roofing Manufacturers Association (ARMA), soft washing is the preferred method for roof algae removal. Pressure washing shingles is prohibited by all roof manufacturers and can void the manufacturer warranty.
Roof cleaning should be done with methods that protect the shingles while fully addressing biological growth. The safest and most common professional method is soft washing.
What is Soft Washing?
Soft washing is a low-pressure roof cleaning method that is done using specialized equipment to apply a biodegradable cleaning solution designed to eliminate algae, moss, and related growth, without damaging the shingles.
Why Pressure Washing is Not Recommended
Removes protective granules from shingles.
Shortens the life of the roof.
Forces water where it does not belong.
Hire a Professional Company Who Provides the Following
Guarantees 100% algae removed from roof surface same day
Aerial before and after photos proof of roof algae removal (For Insurance Underwriter)
Drone Verification Report (For Insurance Underwriter)
Application of a proper roof cleaning solution
Allow dwell time
Same day full rinse of roof
Allow dry time
Repeat where/if needed
Runoff management to protect landscaping
DIY Off The Shelf Cleaners for Roof Cleaning
Requires walking the roof or climbing ladders to apply solution.
Most homeowners will not be able to access their entire roof.
Some off the shelf cleaners are Sodium Hypochlorite based and will kill plants and grass if proper precautions are not taken.
Bottom line: it's unsafe and costly for homeowners to attempt themselves.
In North Metro Atlanta, companies like Blue Mountain Exteriors specialize exclusively in ARMA-approved soft wash roof algae removal, using the proper equipment and techniques to protect your shingles while eliminating the algae safely.