I am kinda likeing this idea as a temp fix. Sounds like its holding up not bad. Just sick and tired of so much dust in everything. If it keeps that down and sits half azzed solid I may try it for now. Especially if you can use it as a base later.
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It absolutely isn't cement but it kills the dust and yes the ratchets in the sand gets old. I attached a couple photos, not very good ones, but gives you an idea. Like the other post of a bag for 4ft sq should work quite well. I probably used less than 20 bags on a 30 x 60 so it wasn't more than a couple cm thick. Was going to be a winter thing which turned out to be a few years lol. Now I get the cement all done and I move so its just a storage shed now, so gravel would have been fine for my future use. Oh and the other huge advantage was it stopped the mice from burrowing under the doors through the gravel