i pressure washed a tennis court last year and have been asked to do it again.
thing is that is made from tarmac and has moss growing on it, the last time i cleaned it i got most of the moss off but there was still some in the gaps, i advised the owner to spray weed killer on it to prevent growing back but he didnt bother
The 1st time i pressure washed it was with the whirlaway but didnt clean it properly and ended up using the lance and took over a day to clean
What would you recommend to spray on the moss prior to pressure washing to make it easier to remove and how long would you leave it to soak?