Asphalt shingles in Laval are particularly vulnerable to algae due to their composition. Our SH + surfactant treatment destroys them chemically.
🔬 Why sodium hypochlorite (SH)?
SH is the only product recognized by shingle manufacturers (IKO, BP, CertainTeed) to safely and permanently eliminate organic stains on roofs. Combined with a professional surfactant, it penetrates protective sheaths and destroys organisms at the root. Results last 3 to 5 years.
Questions about Algae on Shingles in Laval
Green shingles in Laval indicate colonization by algae feeding on calcium carbonate granules. It's very common in shaded and humid areas.
Soft Wash with sodium hypochlorite (SH) is the recommended method in Laval. It destroys algae at the root unlike high pressure which displaces them.
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