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I have the same question. I have a flagstone patio with joints of 1" to a few at 4". I was using Gator Dust but 1 bag went maybe 20 sf. The vendor told me joint area, not overall area so my 4 bags @ 30 went to 24 bags. No one around Birmingham, AL seems to have heard of decomposed granite. Most everyting here is limestone. I did talk to one crushed stone place that had "stone sand" which is limestone fines. He said their Auburn, AL plant had granite fines. Based on what I've been able to read, both of these sound like they'd be ok to use. Can anyone confirm?
I have about 500sf under a deck. Half the deck has a roof and half does not. I have about 100sf in a exterior firepit. The stones are sitting on about 3" or so of sand. The flag is called Alabama Bluestone. It's a light to medium grey sandstone.
Questions:
1. See above, limestone or granite fines ok for my application? Is one better than the other?
2. Would these materials be fairly stiff in the joints? I will have patio furniture on them. Joints are tight in these areas.
3. Would it be ok to mix mortar in at maybe 1:4 or so to get a harder surface but one that is not actually concrete? I read on another thread that polymeric sand has some portland in it. Since I'm on sand it'll still need some give but was thinking a little mortar or portland might stiffen it up a bit.
Any thoughts?
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