Even the web site is excellent I was left a bit undecided if dry sand jointing works well with 450X450 as they are meant to be small but maybe not small enough, can anybody help me?
Certain types of 450mm flags work fine with dry sand jointing, but certain other types, such as riven, really do need a mortared joint. You tell me what type of flags you have, and I'll tell you what would be the better jointing option.