The Brew Cabin

I'm intending to lay a 2m radius circular pattern (concentric rings), using 100mm granite setts (they are not very regular), laid following your flexible construction method and jointed using 2mm-to-dust.
About 75% of the perimeter of the circle is bounded by a circular garden wall, with the sett surface draining on a 1:60 fall to the 25% of the perimeter which is unbounded by any wall - to a yard gully (so the centre of the circle won't be at the high point).
My questions are:
1) what is the best method to help each ring of setts to be as circular as possible? Do I use a string around a centre point and draw lines as a guide in the bedding sand, working out one ring at a time?
2) any other tips for what (seems to me) is a fairly complicated 1st attempt at patio work?

Thanks very much - superb web site - one of the best I've seen.

ricklobb

Establish your centre point (the Origin ) of the circle, and drive in a steel pin or similar. Then, use a tape measure or length of non-stretchy string to act as a guide while laying the rings by maintaining a constanyt distance from the origin to the edge of the cube being laid. You could omit the centre stone and start with ring 1 working out, or, you could start with the outermost course and work your way in.

You might have to fettle the spacing to get a full number of courses, so I'd be tempted to work from the outside in, so that there's fewer cubes to re-position to get the spacing right as you reach the centre.

If you look at the Steps for Block Paving page, there's an animated guide to laying in arcs and circles that you might find useful.

Tony

Thanks very much for your answer - much appreciated.

Ricklobb