After cleaning this patio in Cambridge, the results speak for themselves. Firstly we pressure washed the patio, then treated the back spot lichen infestation, then weed killed the joints with a residual weed killer to kill off any remaining roots, and finally re-pointed 75% of the patio with a strong 3:1 sand/cement mix by hand. As you can see the beautiful natural colours of the sandstone are really showing again. Our customer was very pleased with the result.
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