Overcoming Black Lichen Spots on Concrete Patio Slabs
Black spots on a concrete patio are one of the most common complaints among homeowners across Western Sydney. Whether you live in Penrith, Blacktown, Parramatta, Liverpool, Campbelltown or the Hills District, the combination of shaded outdoor areas, seasonal humidity and porous concrete creates ideal conditions for lichen, algae and mould. This guide explains what those dark patches actually are, why they appear, and how to remove them safely and keep them from returning.