Hi , did a pressure washing job today, mostly concrete paths and flag stones. Got asked for a price for a large area of block paves too. Gave price and all set to go ahead when the weather pics up later in the year.
Now, I have done plenty of block pave cleans before and they all came up like new but this is the worst case of lichen I have ever seen.
I know for a fact that there will still be some black spots left after I have gone over the blocks. I dont really want to blast them with a turbo lance and was wondering if there is anything on the market that can be applied before hand to start to break it down a little before I go in with the old pressure washer.
Thanks in advance for any replies.
ANT
TVCS