Downstream straight sh, surface clean respray with sh collect check roll down the road. I dont get why you would be doing a demo for a residential driveway,give them a price and move on,two trips to the same place is a profit killer.
You live in Lakeland Florida...Trust me,,, There is mold on the concrete. DS a mix of soap and SH. Surface clean, rinse and then DS a second coat of SH and soap and leave it to dry. The SH will also eat up any organic stains from that concrete under that big oak tree.
If you had a dedicated roof pump or air pump i would get the mix just as i would a roof mix and add a bit of caustic and watch it roll.The stronger the mix the less trouble you will have taking it all up.Those little black dots are a pain if you have to go back and wand several places.Good luck i hate washing cracked driveways the dirt will always find its way onto the freshly cleaned areas.
That's what I was thinking except the part about leaving the second application to dry (SH sure, but soap?). Wouldn't the soap leave a film that if it rained shortly thereafter would become slippery?
If you had a dedicated roof pump or air pump i would get the mix just as i would a roof mix and add a bit of caustic and watch it roll.The stronger the mix the less trouble you will have taking it all up.Those little black dots are a pain if you have to go back and wand several places.Good luck i hate washing cracked driveways the dirt will always find its way onto the freshly cleaned areas.
The soap in the mix leaves ZERO film and no, the concrete does not become slippery. We Do a zillion driveways and sidewalks a year this way.
You live in Lakeland Florida...Trust me,,, There is mold on the concrete. DS a mix of soap and SH. Surface clean, rinse and then DS a second coat of SH and soap and leave it to dry. The SH will also eat up any organic stains from that concrete under that big oak tree.
Darryl I see are you cleaning his drive and walkways for free or just a spot. Good luck on the project sounds like it will be a big one
The soap in the mix leaves ZERO film and no, the concrete does not become slippery. We Do a zillion driveways and sidewalks a year this way.