The aggregate shown below was salvaged from a shed that I removed from my backyard I am planning to use it to correct the pitching of my patio (see my other questions in this forum for details)

Can I use this aggregate? It is pretty similar with what was used before when the patio was installed

bigger pictures here:

Note: first picture shows a coarser aggregate Second picture shows some traces of gravel. I can remove those, that is not a problem enter image description here enter image description here

1 Answer 1


Yes, what you have is stone dust, and it is what I used as the top 2.5" layer under my patios. It is perfect for making grade adjustments to the patio. Keep in mind under the 2.5" top layer there should be a 4 - 6" base of compactable gravel for best drainage.

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