You can lay Limestone paving in the same why you would install any natural stone or porcelain paving products. Basically they should be laid on a full wet bed of mortar over a compacted hardcore base, deep enough for the site conditions. For further reading please follow the link to our tech guide:
We would additionally always recommend using a slurry primer when installing Limestone paving to help bond the slabs and the sub-base together, this will result in a greatly improved installation.