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Black Spot Lichen on Roof Tiles: Causes & Treatment
What Causes Black Spot Lichen on Roof Tiles? Black spot lichen on roof tiles is caused by airborne lichen spores colonising damp, porous or slow-drying roof surfaces. It is most common where roof tiles hold moisture, receive limited sunlight, sit beneath trees, or have developed a rough surface through age...
Patio Cleaning Secrets for Longer Lasting Results
The Secret to Longer Lasting Patio Cleaning Results The secret to longer lasting patio cleaning results is not simply using more pressure. It is using the right cleaning method for the surface, removing organic growth properly, applying a suitable treatment where appropriate, controlling run-off, and leaving the patio in a...
Why Patio Black Spots Return & How to Stop Them
Why Patio Black Spots Keep Returning Patio black spots keep returning because the underlying lichen, algae and organic contamination have not been fully killed or removed from the pores of the paving. Pressure washing often removes the visible surface staining, but black spot lichen can remain rooted into sandstone, limestone,...
Patio Black Spots: Why They Return & How to Stop Them
Why Patio Black Spots Keep Returning Patio black spots keep returning because they are usually not just surface dirt. In most cases, black spots on paving are colonies of lichen and associated organic growth that have anchored into the microscopic pores of stone, concrete or clay. If the growth is...
