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How to Remove Black Spots from a Patio Safely
How to Remove Black Spots From a Patio Black spots on a patio are usually lichen colonies that have rooted into the surface of paving slabs, especially Indian sandstone, limestone, concrete flags, porcelain grout lines and older block paving. The most reliable way to remove them is to combine correct...
Why Patio Black Spots 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, they are colonies of black lichen or deeply embedded organic growth that has rooted into the pores of natural stone, concrete or paving. If the organism is not...
