I have acquired many reclaimed solid clay bricks and plan to use them as a patio. I will likely lay them in a herringbone pattern. The edges will be side-by-side held in place with plastic edging. Similar to this:
My question is... should I leave a gap between the pavers to allow for expansion and/or to allow for a sand-filled joints? If so, how much gap should I leave and what would you recommend to use to keep the gaps uniform?