Posted: 06/09/2013 at 20:24
Professionals and knowledgable amateurs, even ones with as little knowledge as me, would NEVER use the "5 dabs" method. It will not last.
1. It allows water to gather, erode the ground and the slabs soon begin to rock.
2. Water can freeze and expand - cracking your slabs.
3. It allows insects to burrow, especially ants.
If you hire someone to lay slabs and you see that they intend to use this method - get rid of them and get someone else.