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
Early spring = more work.