Stone porosity

Patio flagstones (slabs), concrete flags, stone flags including yorkstone and imported flagstones.
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exoticpete
Posts: 117
Joined: Thu Feb 05, 2009 4:49 pm
Location: Berkshire

Post: # 106239Post 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
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lutonlagerlout
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Joined: Fri Aug 04, 2006 12:20 am
Location: bedfordshire

Post: # 106243Post lutonlagerlout

slate and granite are both used extensively on roofs pete so are generally very impermeable,I would say slate is the most
LLL
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London Stone Paving
Posts: 2199
Joined: Mon May 10, 2010 1:07 pm
Location: Surrey
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Post: # 106296Post 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
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