Did some reading, some people have success with stronger SH, I’ll be using an Xjet.
Thoughts?
I’m assuming this is limestone, as there is a lot of it here in KY.
Definitely not lime stone…some type of slate maybe but not limestone I can 100% guarantee that
It’s flagstone
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Ah cool, flagstone. Apparently a sedimentary rock, so SH probably won’t hurt it? The mortar in between has blackened as well. I don’t know if it’ll hold up to a surface cleaner though.
Sh won’t hurt it but pressure will so go easy. No surface cleaner or turbo nozzle
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Perfect, thanks. 4-6% SH, let dwell for 10-15min and hose off with Xjet.
I’ll do a before and after here in a few days.
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No sure what the xjet is going to do but a medium pressure nozzle 1000 psi is what we use
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I’ll apply the SH with it, then use it to hose off.
You can put 12.5% SH on it without worries for the stone, but the grass, well it will be toast.
Pressure though - look at the larger stone just north of middle. On the right side you will see a ridge. Hit it with pressure and you will probably see a flat sheet of the stone go flying off.
Looks like a somewhat narrow walkway. Not sure X-jet would be the way to go as the over-spray of chem would be all over the grass.
Personally, I would try light to med/light pressure with hot water first. See how much comes off without chem.
Then using Pump Up, start with a weak SH solution with a good 10-15 dwell and rinse. Ramp up SH strength if needed. The grass is what I would be worried about more than the stone.
I only have a 4gpm and 6% SH. The pool stores closed for the season.
