Patio crossfalls

Patio flagstones (slabs), concrete flags, stone flags including yorkstone and imported flagstones.
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Forestboy1978
Posts: 1000
Joined: Sun Oct 23, 2011 9:57 am
Location: southampton, hampshire

Post: # 73982Post Forestboy1978

Laying an indian sandstone patio on Tuesday. Approx 40m2. I was going to aim for a crossfall gradient of about 1/60 which over the length of the patio from the house outwards is approx 11.6cm.

Was just wondering how strict I have to be with is. I have several holes in the patio where raised planters will be positioned etc etc. If I put in a slight end fall towards the planters can I get away with reducing the crossfall or would this be too risky.
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lutonlagerlout
Site Admin
Posts: 15184
Joined: Fri Aug 04, 2006 12:20 am
Location: bedfordshire

Post: # 73993Post lutonlagerlout

is it riven stone?
anything less than 1:60 with riven you risk ponding
LLL
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Forestboy1978
Posts: 1000
Joined: Sun Oct 23, 2011 9:57 am
Location: southampton, hampshire

Post: # 74009Post Forestboy1978

yeah it's riven. Guess I'm at 1 in 60 then!
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