I was contracted to build an irregular flagstone walkway, dry-lay, about 70' long by 5' wide.
Knowing that it would double the labor and thus eat into profits I still decided to go ahead and lay these stones so that they butt up against each other nice and tight. Average seam is lmaybe a quater inch, many are much less--when I broke a stone or two with the mallet whilst leveling them off, they were quite difficult to pry loose.
Since I rarely see patios and never have seen a walkway built so tightly spaced (and since my perfectiionism cost me dearly!) I figured I'd share.
http://www.devineescapes.com/sitebuildercontent/sitebuilderpictures/needlemanwalk5