Hadn't thought about what pressure, cleaning solution, etc. until I saw the recent post on pressure washers; so what's a good pressure for a concrete drive and patio. I'd like to blast the grass and moss from the joints in the patio stone too.
Is the cleaning solution just a detergent like laundry detergent or does someone have a magic formula? I don't want the runoff to kill the surrounding grass.
Early spring = more work.
Tomsic