Safe-roof-cleaning FAQroof-a-cide-west-before-after-stacked1

In warm humid climates roofs quickly become infested by wind driven algae, mold and fungus spores which land on roof, grow and form colonies producing black stains.

“The Treatment is the Cure”.™

    Since 1992, Roof-A-Cide® is the Only EPA Registered and Roofing Manufacturer Approved solution specifically formulated for roofs. An Eco-friendly product, Unconditionally Guaranteed for 2 full years to Prevent Recurring Mold, Mildew and Fungus. 

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Q. What type of roof can Roof-A-Cide® Treatment be applied to?

A. Asphalt Shingle, Clay tile, Concrete tile, Stone-coated Steel and Slate roofing systems.


Q. How does Roof-A-Cide® Treatment protect my roof from ugly black stains?

A. Roof-A-Cide® Treatment chemically bonds to the roof, preventing recurring mold, mildew and fungus. The roof is now protected. Roofs are cleaned ONCE, if needed, cleaning surface of any algae, mold, mildew, fungus or debris present. 

  • Asphalt Shingle or Stone-coated Steel roofs are cleaned with Roof Restore® Cleaner and rinsed with water. See roof cleaning / treatment of Stone-coated steel video – Clean/ RAC Treatment
  • Clay, concrete tile and slate roofs are cleaned and rinsed with water. See video – EBGtreat
  • Tile cleaning with a surface cleaner and only water – Advanced Cleaning Solutions.


Q. Can Roof-A-Cide® Treatment be applied without cleaning a dirty, infested roof?

A. The roof condition will be a factor. The treatment application / cleaning process will continue for 2 years, but, will require 3-6 months, with seasonal rainfall to dislodge and wash away mold, fungus.

Q. Can Roof-A-Cide® Treatment be applied without walking on the roof?

A. Yes, Treatment is applied to roof via a fine spray from ladders, bucket or UAV Drone.


RAC West before after arsm
Roof-A-Cide West, before and after Roof Restore Cleaning and Roof-A-Cide ® Treatment.


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Q. Does Roof-A-Cide® Stain treatment contain toxic or corrosive chemicals?

 A. NO. Roof-A-Cide® does not contain toxic or corrosive chemicals. Safe for People, pets and plants.

Q. Will a Roof-A-Cide® Treatment cancel my roofing manufacturer warranty?

 A. NO. Roof-A-Cide® Stain Treatment is approved by major roofing manufacturers; GAF, EagleUS Tile, CertainTeed, Crown, Entegra, Boral, Gerard Roofing Stone-coated steel.

Q. What is no pressure, no rinsing, soft wash chemical roof cleaning?

 A. No pressure, chemical soft wash roof cleaning, is a toxic high strength chlorine / chemical mixture, no rinse method. Also known as; Certified, Soft wash (Duck sauce), Sodium hypochlorite SH, Foam, No pressure roof cleaning. Runoff will kill plants and shrubs. 

Roof cleaning contractors use toxic corrosive mixtures; DIY Fruit scented, citrus, fruit “sauce” leaners, Pool Chlorine, household bleach, ammonia, Sodium Hypochlorite (SH) or Sodium Hydroxide (Lye), mixture is not rinsed off.  

Expect immediate but temporary results. Not a safe, cost-effective long term solution. Unfortunately, harsh chemical roof cleaning contractors are virtually unregulated.     

Chlorine Bleach is Corrosive and should not be used for roof cleaning. Especially, when used in high strength (50 – 90%) concentrations throughout Florida. Chlorine Bleach should always be rinsed off to avoid damage to the roof.  Requires repeating the bleach / chemical cleaning process, in 6-12 months depending on where you live. 

NO written warranty. Not environmentally or plant friendly. All plants and shrubs must kept covered, wet during and after cleaning. Harsh Chemical “Soft Washing” methods will dry out the roof prematurely and shorten it’s service life. Pest control service products applied are neutralized. Always ask contractor for product documentation / current SDS of any substances to be used.

 Q. What is a biocide roof cleaner?

  A. Biocide or foaming disinfectant cleaners are common and typically used in food processing/handling equipment and other industrial applications have found their way to your roof. OTC (Home and Hardware stores) cleaning products are sold as; green wash, bio cleaners/ foams/ blockers, cationic surfactants, no rinse methods, and citrus odor cleaners.

QUATS – (Quaternary Ammonium Compounds). Ex: alkyl dimethyl benzyl ammonium chloride, ex: alkyl benzene ammonium chloride. Safer for your roof than Chlorine, but, not EPA Approved. Runoff kills plants and shrubs.

QUATS and surfactant cleaning products are sprayed on the roof, not rinsed off and will require 3-6 months and adequate rainfall to see results. Ex: alkyl benzene ammonium chloride. Follow up cleanings are an additional cost and a frequent disruption to your community. Cleaning with Quaternary Ammonium Compounds requires repeating the process in 3 – 6 months depending on where you live. This is NOT a cost-effective, long term solution.

  • FACT: Bleach and TSP (Tri sodium phosphate) will corrode metal (even in weak concentrations) and High-Strength Chlorine Bleach (Pool Chlorine 12.5%) widely used, will accelerate the damage – especially when the roof is not rinsed.
  • FACT: No Roofing Manufacturer in the US recommends the High-Strength Chlorine Bleach solutions that are applied and left on roof all over Florida and increasingly throughout the US.