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Posted: Fri Aug 24, 2007 2:17 pm
by fredmila
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?
Ta in advance
Posted: Fri Aug 24, 2007 7:47 pm
by lutonlagerlout
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
Posted: Fri Aug 24, 2007 10:50 pm
by matt h
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
Posted: Sat Aug 25, 2007 8:18 pm
by fredmila
Err, yes but what should the bedding be like in this case, do I need to put more cement than sand, do I need a sub.base, etc
Posted: Sat Aug 25, 2007 8:53 pm
by lutonlagerlout
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
Posted: Sun Aug 26, 2007 10:36 am
by Tony McC
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.
Posted: Sun Aug 26, 2007 11:21 am
by fredmila
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?
Posted: Sun Aug 26, 2007 2:50 pm
by Tony McC
Yes and yes.
Posted: Sun Aug 26, 2007 4:29 pm
by fredmila
Thanks for the feed-back
Posted: Sun Aug 26, 2007 7:07 pm
by lutonlagerlout
rubber mallet fred wickes £2
you know it makes sense
LLL 
Posted: Mon Aug 27, 2007 8:21 am
by seanandruby
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.
Posted: Mon Aug 27, 2007 9:16 am
by squire
Guess who swallowed a dictionary 