Moss on roofs in Sainte-Thérèse is encouraged by our Quebec climate — humidity, shade from mature trees and freeze-thaw cycles create ideal conditions. The larger it grows, the more it acts like a sponge, retaining water against your shingles.
🔬 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 Moss on Roof in Sainte-Thérèse — What to Do?
Moss in Sainte-Thérèse appears in shaded and humid areas. Surrounding trees, north exposure and our Quebec climate are the main factors.
Yes. Moss retains moisture, lifts shingles, can cause leaks and accelerates roof degradation. In Sainte-Thérèse, left untreated, it can cause structural damage.
Moss removal in Sainte-Thérèse is included in our standard cleaning from $399. An adjustment of $0.05/sq.ft to $0.10/sq.ft may apply depending on the amount of moss.
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