Block paving, laying bed ?

[tommo1]

hi all,

having my drive paved at the moment, was stoned up
a couple of weeks ago, planning to have blocks laid next
month, the person doing it is a friend of the family and he,s
planning to lay the 50mm blocks on lime stone dust,
he reckons the dust will be a lot better than grit sand,?
my van will using the drive mainly, with quite a bit of weight in, what do you guys recommend ?? thanks....

[msh paving]

I wouldd suggest its a no to using it as a laying couse because it will compact to hard to screed and not be flxable enough,
Sharp sand laid 40mm finished screed thickness on a 150mm thck type1 sub base is what you need MSH

[r896neo]

Stone dust is a disaster to lay on as it holds water really badly making it very unstable

[Tony McC]

Noooooh! Not limestone dust. The man's a fool!

It's too fine; it will bind; it isn't sufficiently free-draining.

Time and time again I say the same thing: there are very, VERY good reasons why the standrads require a specific sand/grit for use as a laying course. All these eejits who reckon they have summat better, that adding cement improves the perfomance, that omitting the sand altogether prevents rutting, they are deluded. If *any* of these screwball suggestions had any validity whatsoever, we'd be using them. They don't, so we don't!