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Posted: Wed Sep 23, 2015 5:11 pm
by exoticpete
Hi all just for reference what stone is the least porous or does it depend on where its quarried from I was thinking slate then the harder sandstone/limestone then granite ?
Many thanks
Peter
Posted: Wed Sep 23, 2015 5:23 pm
by lutonlagerlout
slate and granite are both used extensively on roofs pete so are generally very impermeable,I would say slate is the most
LLL
Posted: Sat Sep 26, 2015 3:25 pm
by London Stone Paving
As Tony says, slate and granite are both very dense. Its also worth noting that the Indian quartzitic sandstones from the Kota belt are extremely hard