No, it’s all brand new from the renovation and just lots of muddy boot prints. There’s an entire back patio of the stuff, along with a back walkway and front porch. I’m guessing at least 1500 sq/ft, will measure tomorrow.
Also there was a couple planters out front and a couple spots got scratched, not sure what she can do with that.
Low pressure, high volume. 1-2k. 4+gpm. 25-40+ tip size. Use Siloxane PD to seal. Spray on until saturated. Dries unnoticeable until it rains and beads the water.
Edit- for a surface cleaner, the wider the better.
Looks like a local retailer sells Prosoco Sure Klean PD, I’ll give them a call tomorrow. I will probably need four 40035 tips if I’m doing the calculator correctly. Right now I have 25025’s getting 2500-ish psi.
OK, listen up. Typically on newer installs like this one, you want to hit it with the nmd80 because there are usually some mortar smears or glaze from the polymeric sand if they used that. It will also get rid of the mud stains from people tracking on it. Do not do this job until everyone else is out of the way, including landscapers. You need to be the last man standing.
Buy one of the nmd80 sprayer attachments, makes it stupid easy. Once you spray it on there, let it dwell about 10min and then spray again. don’t let it dry. If not real dirty, then you may be able to get by with one application. 1500 ft you may go thru 10gal. About $80 for a 5gal here. Rinse off with light - medium pressure unless you’re just doing small area at a time. Then start surface cleaning. I leave my injector bypass on which lowers my psi to about 2000psi and you’ll be perfect. Rinse really well. Even though you’re not doing joint stabilization on this one, I still like letting it dry for a day. In fact carry your blower with you to blow off excess water and you’ll need even during the sealing phase, to gently blow out any puddles or excess while sealing.
On a job this big, you probably want to build you a little portable 12v system using 2.2 gpm pump. Here are pics of both of mine - notice the Chapin sprayer nozzle and wand I took pics of. Can get from Grainger. Just sent all these pics to @DisplacedTexan.