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Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

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Removal of gloeocapsa magma from asphalt and metal roofs

Q. I am trying to find a safe chemical to use in the business of asphalt, metal, and wood roof cleaning, mold removal. I think there must be some chemical that is safe. For instance, bleach will do the job but kills the plants. Any help appreciated.

Gary Ronald Smith
Roof mold removal - Texarkana, Arkansas, USA
2004

Roof Cleaner

on Amazon

(affil links)

Q. DID YOU FIND A CHEMICAL THAT WORKS? I WOULD LIKE TO HEAR FROM YOU, THANKS -- TED

TED SULLIVAN
- LEWISVILLE, North Carolina
2006

A. You are right, Bleach is a quick way to kill plants, but it also destroys the shingles (think of what it does to a pair of jeans).

The safest way to clean a roof and rid yourself of Gloeocapsa magma is to use a purpose built cleaner. Something Quick, Simple and Effective would be ideal.

Once cleaned, you'll need to annually prevent the return of the algae.

Scott Sellinger
- Atlanta, Georgia, USA
2007

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