What is the best material to use under paving stones on a dr

let me know if any anybody know about this

Hi, I'm assuming you mean "under paving stones on a driveway?"

Usually, a combination of crushed rock or gravel and coarse sand works well.

For a base layer add in around 10 - 15 cm of either gravel or crushed rock and be sure to compact it properly.

For the bedding layer add course sand around 2-3 cm.

Take into account drainage, the soil type to begin with and also what type of vehicles will be using the driveway!

HTH
Mark

thanks