This block paved driveway is north facing and beneath a large tree, so it doesn't get much sunlight.
The blocks were quite dirty and moss was growing in all the joints. Blackspot was also present over much of the area.
After pressure washing with a turbo lance, a deep clean treatment was applied to dissolve away any remaining organic stains.
After leaving a couple of days to dry off, the area was re-sanded to finished off the job.
Re-sanding block paving is very important as it lock the blocks together and prevents any movement.