laying indian sanstone, to what level ?

[studmuffin]

Hi guys, even though its not tiles i have been advised to come to the tiling section as ive been told you guys know your stuff !

I’m laying Indian sandstone paving, there are some slabs with ridges on, i don’t know what level to use when laying them, do i use the highest point {the ridges} of the slab or do i use the the actual join or the where the actual slabs butt up to each other ?

Thanks

[wine~o]

Darren has given a link to answer this in the other thread..