Should You Wet Stone Dust

Stone dust is a fine material that absorbs moisture readily, then releases it slowly. … In extreme frost-thaw cycles, water-soaked stone dust can actually pump up through the joints, shifting pavers in the process.

Do you need to compact stone dust?

Also called rock dust, stone dust is more prone than sand to settling and drainage problems when used as a base beneath walkway or patio pavers. … A proper base material can be compacted easily; however, due to stone dust’s powdery nature, it does not compact as well as other materials.

How do you use flagstone stone dust?

You simply sweep the material into the flagstone (or other paver) joints, lightly hose down, then it solidifies. Once it dries and hardens, the sand stays in place. It does not get dug out by ants, weeds can’t grow through it and it does not wash out.