I bought -cheaply- stone flags for paving the rear pation of my house (no cars). They are the type that is flaky and are 400x400 mm. The only problem is that they have different thicknesses and they are thinner than the ones on the instruction page http://www.pavingexpert.com/patio01.htm
where the thickness of flags is indicated as 30-50mm. Mine go from 30mm to as thin as 10mm.
Should I use a different method to lay them and how? If I need to eliminate the 10mm ones, what is the thinnest I can use?
sounds like some low grade indian sandstone
you will need to adjust your bedding mixture depth to accomadate the variation in thickness mate
you get what you pay for i'm afraid
LLL
cheap flags more work I'm afraid:( It is adviseable to pay a little more and have an even base, than to spend ages on each individual block, but if you have plenty of time on your hands, well best of luck
general builder, maintenance engineer, gas and plumbing installations, extensions etc
as per main site fred,your thickest flag will determine your thinnest bedding area which should be no less than 30 mm bedding
i have used flags like this from time to time and the trick is sorting out the very poor ones for cuts or edges
LLL
You don't really need to beef-up the laying course mix, just use more of it. As for a sub-base, there's a whole FAQ about the need for sub-bases beneath patios, but it's not practical to create a sub-base that takes account of variation in flag thickness: that's one of the reasons we have a laying course.
So if I keep a mix of 10:1 grit sand/cement but make it thicker, about 50mm it would allow me to tap in the thicker stones with less difficulty? Will it be strong enough to flags 10mm thick?
Fred, When the level of analysis of a construct is under debate, i suggest that fairness and research rigour will be enhanced by measurement strategies that allow for empirical testing of appropriate levels of analysis.
