I'm not sure where you're from but the usual recommendation is to put done 4" to 6" of base rock (compacted) and then a 1" layer of washed Concrete sand, lay the stone/pavers and finally sweep in the polymeric sand and pass a vibrating plate over to lock everything together.
Polymeric sand is expensive and used to lock the stones/pavers together not as the 1" sand layer.
Polymeric sand is expensive and used to lock the stones/pavers together not as the 1" sand layer.
