Right being the sort of bloke that likes helping people.I was talking to my next door neighbour yesterday.He is putting down a slab base for a greenhouse.Well first thing he said was that he was going to hire a skip.Why i asked when you could put the grass turf over the road.We all own a small part of a wood.Oh good idea he replies.So he explains what he is going to do.So i said don't bother taking turf over road.Make your raised bed,lay the turf upside down inside it.Let it rot top with compost and better soil.That sorted.So then it's about laying slabs.On a bed of sand,harder than it looks getting a level.So i am going to help 54 slabs 2ft x 2ft.And going to lay them on mortar.So much quicker.Found out the ratio off google about 6 x 1.But a question is it better to lay the mortar on soil covered with weed matting or try to get him to put a sort of stone foundation down first.A greenhouse is not heavy and will not get a lot of footfall.If you know what i mean.