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Posted: Mon May 09, 2016 12:14 am
by LeafySuburbs
Hello,

would a 2cm fall over 4 metres be enough for a garden patio?

Thanks

Posted: Mon May 16, 2016 10:52 am
by r896neo
No chance, sorry.

If you are using something totally smooth you may get away with 100:1 which would be 40mm But you would need to install it pretty perfectly.

For a diyer 80:1 is about the minimum i would recommend.

If you can live with bits pooling here and there then your 200:1 is possible but you'll end up with a poor result with dirty weathered patches where the water pools in corners etc.

Definately not recommended.