Block paving edging blocks

Just sharp sand is the norm round here.

Normally you would want a concrete haunch that retains the edge blocks properly. This needs to be sat on the compacted sub base, not the sand.

as in the diagram at the bottom:

The alternative is just to do a normal course of blocks in a difference colour, so that you can drive over it without incident.

for the weak mix, probably something like 10:1

Not for the edging, unless they're all cowboy jobs.

MBQ

Sounds like the neighbour's drive would be the edging

Well yes. His drive is concrete but a slightly different level, only a couple if inches so I need a proper edging to set it off. I am using the ones with 45 degree chamfer. I want to set them quite low so they don't stick up too much so I am not too worried about driving over them but clipping them on full lock if either I or the neighbour weren't too careful when we reversed out. Laterally they will be wedged in well between the neigbours drive and the other blocks so I don't think that they should move. If they were the edging of a flower bed then I can understand the need to mortar them in well to stop them moving.

Kevin

Yes, in this case, but you referred to "the norm", or did you mean the norm only for cases where there is a solid edge to butt up against?

MBQ

The way I read it is that the chamfer edge takes up the height difference, rather than anything else protruding above your existing block paving. Is that correct? That would look a neat job and be less of a trip hazard for anyone walking between drives.

You might also want to think about setting in some tubes every 6ft along the boundary. You don't want a fence now, but in a few years time it will be trivial to slot fence posts into those holes....

dave.

You've got to use your commonsense. You obviously need something solid at the edges to stop the sand being washed away, or squeezed out under pressure, but the stuff in between isn't going to go anywhere.