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Posted: Tue Mar 03, 2015 8:59 pm
by sy76uk
the reason I ask is because at the marshalls road show they gave a talk about why there sandstone is one of the best on the market, density and low porosity. With that being the case surely a 22 mm flag that is dense would be better than a 25mm flag that is soft and porous?
Posted: Tue Mar 03, 2015 9:25 pm
by lemoncurd1702
Don't think it's about the thickness. The porous ones tend to be a bit flaky and are probably more susceptible to frost damage, also dirt and algae etc is harder to remove.
Posted: Tue Mar 03, 2015 9:38 pm
by lutonlagerlout
all I can say from personal experience is that sawn sandstones are far easier to cut than riven ones
LLL
Posted: Tue Mar 03, 2015 9:57 pm
by London Stone Paving
DempseyLiverpool wrote:New someone said it :;):
I'll take £16 + vat, is that delivered 
Haha....throwback Thursday. I'm always amazed at Lutons ability to locate these old posts
Delivered and installed Ash 
Posted: Tue Mar 03, 2015 10:09 pm
by London Stone Paving
sy76uk wrote:What's the view on marshals only using kota sandstone because of how hard it is and the low porosity rating?
Is 22mm kota sandstone better than 25mm of any other type, say camal or saga black for instance?
Without doubt the Kota sandstone is extremely hard. all of our riven Indian sandstone apart from the mint is sourced from Kota. As I said though, I am not anti 22mm, its just a route we have chosen not to go down.
Saga is also a VERY hard stone. Not sure about camel as its something I have never sourced (although I think its from the Kota region, so again should be quite hard)
Mint is one of the softer ones but the issue is not that the stone will break but that it will weather and darken a lot more quickly than the harder stones. We sell lots of mint and in 9 years of supplying the stuff I've never had a single client come back to me and say that the stone has blown, suffered frost damage or delaminated. Its more down to the quality of the material you buy at source than the material itself.
There are a couple of stones to 100% steer clear of, Rainbow and Teakwood. Soft as the preverbial and mainly used in carving because they are so soft.
Posted: Wed Mar 04, 2015 6:30 am
by lemoncurd1702
I know there has to be a limit, but if it's laid on a full bed (preferably wet), surely that's where much of the strength lies.