Why Does Lichen Grow on Roof Tiles? Causes and Risks
Lichen grows on roof tiles because the tile surface provides a stable, rough anchor that collects moisture, airborne minerals, dust, and organic particles. Lichen is a partnership between a fungus and a photosynthetic alga or cyanobacterium, so it can colonise concrete, clay, slate, and other mineral surfaces without ordinary garden soil. Key Facts at a […]