slabs

[wjc]

Can and What are the disadvanges of laying stright on to soil with a morter bed underneath.Or do you have to have a sharp sand bed first.

[84-1093879891]

Soil is not inert, therefore it "moves", which means the flags laid on top of it will move, settle and become uneven. It's also difficult to achieve even compaction of a soil, which is why we always use a bedding material, usually sharp sand.

Have a read of the main site, where all this is explained in great detail.