Gloeocapsa magma is ubiquitous on roofs in Sainte-Thérèse. Transported by wind and birds, it colonizes shingles and protects itself in a dark gelatinous sheath — hence the characteristic black streaks. It feeds on calcium carbonate granules embedded in your shingles. Sodium hypochlorite (SH) is the only recognized product to penetrate this sheath and destroy the organism.
Why choose Toit Propre in Sainte-Thérèse?
Pricing in Sainte-Thérèse
Minimum $399 before taxes (GST 5% + QST 9.975%). Adjustments for moss, lichens or difficult access. Deposit by Interac: paiements@aqua-net.ca
Frequently asked questions about Roof Algae and Black Streak Removal in Sainte-Thérèse
Black streaks on roofs in Sainte-Thérèse are caused by Gloeocapsa magma, a cyanobacteria that feeds on your shingle granules. It spreads by wind and birds and is very common in the Sainte-Thérèse area.
Only sodium hypochlorite (SH) + surfactant effectively eliminates Gloeocapsa magma in Sainte-Thérèse. High pressure and water washing only disperse the colonies — they come back in 6 months.
Algae and black streak treatment is included in our standard cleaning. Prices from $399 in Sainte-Thérèse. Adjustment possible depending on streak severity.