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Posted: Sat Feb 07, 2015 6:51 pm
by lemoncurd1702
sy76uk wrote:I stand by what others have said about 250mm being to thin but would also like to add that the surface area sounds too big.
a small but thick paver is stronger than a large thin one.
Concur with that. This is probably why Driveline Metro is 80mm thick.
Whatever depth of concrete these are bedded on there's still always the possibility that the paving can flip up as the wheel runs over it.
If anything use a larger slab size that has more contact and adhesion with the bed, or screw them down with rawlbolts 
I'm not earning a commission from Marshalls but Metro has a choice of 4 colours and they don't have to be mixed as in the image.
Posted: Sun Feb 08, 2015 9:19 am
by sy76uk
I quite like the metro. Might look nice laid herringbone too.
Posted: Mon Feb 09, 2015 7:30 pm
by John156
Simon,
The 25 mm granite from CED hasn't been down that long - maybe 8 months. But I've laid 25 mm slate and blue limestone that has been down a few years with no problems. If you can get 50mm at £35m2 as Cookie says then go for that. Gives you more reassurance and that's a good price but I have confidence in 25mm as I've seen the drives I've done hold up.
Construction was - 150mm type 1 , 75mm 3:1 sharp sand wet mortar with sbr added to the mix
Cheers
Posted: Tue Feb 10, 2015 7:35 pm
by sy76uk
That's fair enough John. The only slabs that I have ever put down on a driveway have been 50mm old council grays. I have however seen diveways laid with paving that wasn't designed to be driven on end up looking like crazy paving. Even council grays break from time to time.
If you are confident that what you are laying is fit for purpose through experience who am I to argue. All I know is that I'll only lay paving that is designed for the purpose it's being used for. That way as long as I have laid it to the correct specification I'll have no comebacks if the product fails.