If you see gray, orange or yellowish spots on your roof in Terrebonne-Village, they are probably lichens. This fungus-algae symbiosis is the most destructive of the organisms that colonize roofs. Lichens resist simple washing much better than moss — their rhizines physically anchor in the shingle.
Why choose Toit Propre in Terrebonne-Village?
Pricing in Terrebonne-Village
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 Lichen Removal in Terrebonne-Village
Yes, lichens are the most destructive. Their rhizines extract minerals from your shingles and create microcracks that promote infiltration. In Terrebonne-Village, orange and gray lichens are the most common.
Sodium hypochlorite (SH) at an adapted concentration is the only effective method. Mechanical scraping damages shingles. Simple washing is ineffective. In Terrebonne-Village, our protocol includes extended contact time for established lichens.
Slightly, yes. Severe lichen presence results in an adjustment of $0.05 to $0.10/sq.ft depending on the affected area in Terrebonne-Village. Our online calculator accounts for this factor.